Area Code Splits & Overlays

The exhausting area code is split into two or three geographic areas, leaving the existing area code to serve one side of the geographic area and assigning one or two new area codes to the other segment(s).

An area code overlay occurs when more than one area code serves the same geographic area. In an area code overlay, relief is provided by opening up a new area code within the same geographic area as the area code requiring relief. With an overlay, all current customers keep their area code and telephone number. Numbers from this new area code may be assigned to new telephone customers or those adding additional lines. Because two area codes reside in the same geography, all calls must be dialed using the area code + the seven-digit telephone number (10 digits). (Some states require 1+10-digit dialing)

10-digit dialing is a term used to refer to the practice of including the area code of a phone number when making local calls. It is the required dialing pattern in locations throughout the country that have undergone an area code Overlay. For example, if area code (123) is overlaid with area code (456), then callers within the area served by 123/456 must dial 10-digits in order to place a local call even if the call is from a (123) number to another (123) number. Pre-subscribed long distance calls still require 1+10-digit dialing. Consumers in areas subject to an Overlay should replace all 7-digit telephone numbers programmed into their wireless phones and other devices with 10-digit telephone numbers.

The permissive dialing* period begins with the introduction of the new area code and generally lasts approximately six months. It provides a 'get acquainted' transition period for the new area code. Permissive dialing allows the old and new area code customers to call between the two area codes using seven-digit dialing. During this period, customers should begin to use the area code + the telephone number although calls will still complete if only the seven-digit telephone number is dialed. Customers, from outside the area, can call the new area code by dialing either the old or the new area code + the telephone number; the call will complete during the permissive period. (* The permissive dialing period varies in length per commission decision)

Approximately six months after the introduction of the new area code, an intercept recording period will begin. At this time, callers must use the appropriate area code plus the telephone number. Calls incorrectly dialed will be referred to a recording throughout the recording period. It will inform the calling party that the new area code must be used to complete the call.

If you have family or friends deployed in the military outside of the United States, make sure they know and use your new area codes.

• South Carolina 864 Permissive Dialing Notice
• Minnesota 507/924 Mandatory Dialing
• Tennessee 729/423 Permissive Dialing Notice
• Ohio 440 Area Code Overlay
• Virginia 804 Overlay Customer Notice
• Missouri 573/235 Mandatory Notice
• Arkansas 870 Mandatory Dialing Notice
• Florida 904/324 Mandatory Dialing Notice
• Minnesota 507 Customer Overlay Notice
• South Carolina 864/821 Permissive Dialing Notice
• New York 716/624 Area Code Overlay
• Missouri 816/975 Area Code Overlay
• Wisconsin 608/353 Area Code Overlay
• Florida 904/324 Permissive Overlay Notice
• Florida 645 and 305/786 Area Code Overlay
• Missouri 235/573 Permissive Dialing Notice
• Arizona 602/623/480 Mandatory 10-Digit Dialing
• Arkansas 870 327 Permissive Overlay Notice
• Maryland 227 and 240/301 Area Code Overlay
• Illinois 618/730 Area Code Overlay
• Wisconsin 920/274 Area Code Overlay
• Ohio 513 Area Code Overlay
• California 559 Area Code Notice
• Illinois 309 Area Code Overlay
• New York 845/329 Area Code Notice
• Florida 561/728 Area Code Overlay
• California 369/707 Area Code Notice
• Arizona 602/623/480 10-Digit Dialing & Boundary Elimination Overlay
• California 530 Area Code Notice
• New York 516/363 Area Code Overlay
• Notice of New California Area Code Addition for 213/323 Area Code
• California NPA 209/350 Overlay

To ensure new telephone numbers are available, the Minnesota Public Utilities Commission approved the addition of the new 924 area code to the geographic region of the 507 area code. This process is known as an area code overlay.

What is an area code overlay?

An overlay is the addition of another area code (924) to the same geographic region as an existing area code (507). An overlay does not require customers to change their existing area code but does require using a new dialing procedure to complete calls.

Who will be affected?

The 507 area code covers southern Minnesota and cities including, but not limited to Albert Lea, Austin, Fairmont, Mankato, Northfield, Rochester, Winona, Worthington, and other smaller communities. Anyone with a 507 area code will need to use a new dialing procedure, but will not have to change their telephone number. New telephone numbers may be assigned in the new 924 area code.

What will be the new dialing procedure?

All calls in the 507 area code geographic area that are currently dialed with seven digits will need to be dialed using area code + telephone number. The same dialing procedure will apply to both 507 telephone numbers and telephone numbers that are assigned in the new 924 area code.

When will the change begin?

Beginning July 30, 2024, you must dial the area code + telephone number on all calls, including calls within your same area code. If you do not dial the area code + telephone number, your call will not be completed, and a recording will instruct you to hang up and dial again, including the area code.

Beginning August 30, 2024, new telephone lines or services may be assigned numbers with the new 924 area code.

What will change?

• Dial the area code + telephone number for local calls.
• All services, automatic dialing equipment, or other types of equipment that are programmed to dial a 7-digit number will need to be reprogrammed to include the area code. Some examples are: life safety systems and medical monitoring devices, fire or burglar alarm and security systems or gates, fax machines, Internet dial-up numbers, speed dialers, call forwarding settings, voicemail services and similar functions, etc.
• Update your websites, personal and business stationery and checks, advertising materials, personal and pet ID tags and other such items to ensure the area code is included.

What will remain the same?

• Your telephone number, including current area code.
• The price of a call, coverage area, or other rates and services will not change due to the overlay.
• What is a local call now will remain a local call regardless of the number of digits dialed.
• You can still dial just three digits to reach 911 and 988, as well as 211, 311, 411, 511, 611, 711 or 811 if available in your area.

Who may you contact with questions?

If you have any questions regarding information provided in this notice, please call T-Mobile USA at 1-877-453-1304 or access https://www.t-mobile.com/customers/area-code-splits-overlays for more information or access the Minnesota Public Utilities Commission website at: https://mn.gov/puc/.

To ensure new telephone numbers are available, the Minnesota Public Utilities Commission approved the addition of the new 924 area code to the geographic region of the 507 area code. This process is known as an area code overlay.

What is an area code overlay?

An overlay is the addition of another area code (924) to the same geographic region as an existing area code (507). An overlay does not require customers to change their existing area code but does require using a new dialing procedure to complete calls.

Who will be affected?

The 507 area code covers southern Minnesota and cities including, but not limited to Albert Lea, Austin, Fairmont, Mankato, Northfield, Rochester, Winona, Worthington, and other smaller communities. Anyone with a 507 area code will need to use a new dialing procedure, but will not have to change their telephone number. New telephone numbers may be assigned in the new 924 area code.

What will be the new dialing procedure?

All calls in the 507 area code geographic area that are currently dialed with seven digits will need to be dialed using area code + telephone number. The same dialing procedure will apply to both 507 telephone numbers and telephone numbers that are assigned in the new 924 area code.

When will the change begin?

Beginning July 30, 2024, you must dial the area code + telephone number on all calls, including calls within your same area code. If you do not dial the area code + telephone number, your call will not be completed, and a recording will instruct you to hang up and dial again, including the area code.

Beginning August 30, 2024, new telephone lines or services may be assigned numbers with the new 924 area code.

What will change?

• Dial the area code + telephone number for local calls.
• All services, automatic dialing equipment, or other types of equipment that are programmed to dial a 7-digit number will need to be reprogrammed to include the area code. Some examples are: life safety systems and medical monitoring devices, fire or burglar alarm and security systems or gates, fax machines, Internet dial-up numbers, speed dialers, call forwarding settings, voicemail services and similar functions, etc.
• Update your websites, personal and business stationery and checks, advertising materials, personal and pet ID tags and other such items to ensure the area code is included.

What will remain the same?

• Your telephone number, including current area code.
• The price of a call, coverage area, or other rates and services will not change due to the overlay.
• What is a local call now will remain a local call regardless of the number of digits dialed.
• You can still dial just three digits to reach 911 and 988, as well as 211, 311, 411, 511, 611, 711 or 811 if available in your area.

Who may you contact with questions?

If you have any questions regarding information provided in this notice, please call T-Mobile USA at 1-877-453-1304 or access https://www.t-mobile.com/customers/area-code-splits-overlays for more information or access the Minnesota Public Utilities Commission website at: https://mn.gov/puc/.

To ensure new telephone numbers are available, the Tennessee Public Utility Commission approved the addition of the new 729 area code to the geographic region served by the 423 area code. This process is known as an area code overlay.

What is an area code overlay?

An overlay is the addition of another area code (729) to the same geographic region as an existing area code (423). An overlay does not require customers to change their existing area code but does require using a new dialing procedure to complete calls.

Who will be affected?

Anyone with a 423 area code will be affected. The 423 area code covers two non-contiguous regions in eastern Tennessee, serving communities such as Chattanooga, Bristol, Johnson City and Kingsport, as well as many other smaller communities. The new 729 area code will serve the same geographic region currently served by the existing 423 area code.

What will be the new dialing procedure?

All calls in the 423 area code that are currently dialed with seven digits will need to be dialed using the area code + 7-digit telephone number. The same dialing procedure will apply to telephone numbers that are assigned in the new 729 area code.

When will the dialing change begin?

Effective August 5, 2024, dial the area code + telephone number whenever you place a call, including calls within your same area code. If you forget and dial just seven digits, your call will still be completed.

Beginning February 5, 2025, you must dial the area code + telephone number on all calls, including calls within your same area code. On and after this date, if you do not dial the area code + telephone number, your call will not be completed, and a recording will instruct you to hang up and dial again, including the area code.

Beginning March 5, 2025, new telephone lines or services may be assigned numbers with the new 729 area code. If you have a number in the new 729 area code, you must dial the area code + telephone number or the call will not complete.

What will change?

• Dial the area code + telephone number for local calls.
• All services, automatic dialing equipment, or other types of equipment that are programmed to dial a 7-digit number will need to be reprogrammed to include the area code. Some examples include: life safety systems and medical monitoring devices, fire or burglar alarm and security systems or gates, fax machines, Internet dial-up numbers, contact lists in wireless or mobile phones, speed dialers, call forwarding settings, voicemail services and similar functions, etc.
• Update your websites, personal and business stationery and checks, advertising materials, personal and pet ID tags and other such items to ensure the area code is included.

What will remain the same?

• Your telephone number, including current area code.
• The price of a call, coverage area, or other rates and services will not change due to the overlay.
• What is a local call now will remain a local call regardless of the number of digits dialed.
• You can still dial just three digits to reach 911 and 988, as well as 211, 311, 411, 511, 611, 711 or 811 if available in your area.

Who may you contact with questions?

If you have any questions regarding information provided in this notice, please call T-Mobile USA at 1-877-453-1304 or access https://www.t-mobile.com/customers/area-code-splits-overlays for more information. You may also visit the Tennessee Public Utility Commission website at https://www.tn.gov/tpuc/news.html.

To ensure a continuing supply of telephone numbers, the Public Utilities Commission of Ohio has approved an all-services overlay for the 440 area code. The 440 area code serves the northern portion of Ohio which includes all or parts of the southern, western, and eastern suburbs of Cleveland. The 440 NPA also includes the larger cities and communities, such as but not limited to, Ashtabula, Eastlake, Elyria, Lorain, Mentor, North Olmsted, North Ridgeville, North Royalton, Parma, Solon, Strongsville, Westlake, and Willoughby. The new 436 area code will serve the same geographic area currently served by the 440 area code.

What is an Area Code Overlay?

An overlay is the addition of another area code (436) to the same geographic region as an existing area code (440). The overlay does not require you to change your existing area code or phone number, or how you dial your calls. You will continue to dial the area code and phone number for all local calls, as you do today, within and between the 440 and 436 area codes.

Who is affected and when does the new 436 area code become effective?

Beginning March 1, 2024, customers in the 440 area code region may be assigned a number in the new 436 area code when they request new service or an additional line. Customers receiving the 436 area code will be required to dial the area code and phone number for all local calls, just as customers with telephone numbers from the 440 area code do today.

What will you need to do?

Customers in the overlay region should:

• Continue to dial 10 digits for all local calls, including calls within the same area code.
• Continue to identify your telephone number as a 10-digit number, and include the area code when giving the number to friends, family, business associates, customers, etc.
• Ensure that all services, automatic dialing equipment, or other types of equipment recognize the new 436 area code as a valid area code and continue to store or program telephone numbers as 10-digit numbers. Some examples are: stored telephone numbers in contact lists in wireless phones, PBXs, fax machines, Internet dial-up numbers, speed dialers, call forwarding settings, voicemail services, medical alert devices, safety alarm security systems and gates, ankle monitors and other similar equipment.
• Check items such as your website, personal and business stationery, printed checks, advertising materials, contact information, and your personal or pet ID tags to ensure the area code is included.

What will remain the same?

• Your telephone number, including current area code, will not change.
• The price of a call, coverage area, or other rates and services will not change due to the overlay.
• What is a local call now will remain a local call.
• You will continue to dial 10 digits for local calls within and between the overlay area codes, and 1+10 digits for long distance calls.
• You can still dial just three digits to reach 911 and 988, as well as 211, 311, 411, 511, 611, 711 or 811 if those are currently available in your community.

Who may you contact with questions?

If you have any questions regarding information provided in this notice, please call T-Mobile USA at 1-877-453-1304. You can also visit the Public Utilities Commission of Ohio website at https://puco.ohio.gov/news/area-code-announced-440-exhaust.

To ensure a continuing supply of new telephone numbers, the Virginia State Corporation Commission has approved an all-services area code overlay for the 804 area code region. The 804 area code serves the central portion of eastern Virginia, including Richmond, Ashland, Charles City, Chesterfield, Columbia, Hague, Henrico, New Kent, Petersburg, Reedville, and Water View. The new 686 area code will serve the same geographic area currently served by the existing 804 area code.

What is an area code overlay?

An overlay is the addition of another area code (686) to the same geographic region as an existing area code region (804). The overlay does not require you to change your existing area code or phone number, or how you dial your calls. You will continue to dial the area code and phone number for all local calls, as you do today, within and between the 804 and new 686 area codes.

Who will be affected and when does the new 686 area code become effective?

Beginning February 1, 2024, customers in the 804 area code overlay region may be assigned a number in the new 686 area code when they request new service or an additional line. Customers receiving a 686 area code will be required to dial the area code and phone number for all local calls, just as customers with telephone numbers from the 804 area code do today.

What will you need to do?

Customers in the overlay region should:

• Continue to dial 10 digits for all local calls, including calls within the same area code.
• Continue to identify your telephone number as a 10-digit number, and include the area code when giving the number to friends, family, business associates, customers, etc.
• Ensure that all services, automatic dialing equipment, or other types of equipment recognize the new 686 area code as a valid area code and continue to store or program telephone numbers as 10-digit numbers. Some examples are: stored telephone numbers in contact lists in wireless phones, PBXs, fax machines, Internet dial-up numbers, speed dialers, call forwarding settings, voicemail services, medical alert devices, safety alarm security systems and gates, or other similar equipment.
• Check items such as your website, personal and business stationery and printed checks, advertising materials, contact information, and your personal or pet ID tags to ensure the area code is included.

What will remain the same?

• Your telephone number, including current area code, will not change.
• The price of a call, coverage area, or other rates and services will not change due to the overlay.
• What is a local call now will remain a local call.
• You will continue to dial 10 digits for local calls within and between the overlay area code, and 1+10 digits for long distance calls.
• You can still dial just three digits to reach 911 and 988, as well as 211, 311, 411, 511, 611, 711 or 811 if those are currently available in your community.

Who may you contact with questions?

If you have any questions regarding information provided in this notice, please call T-Mobile USA at 1-877-453-1304. You can also visit the Virginia State Corporation Commission’s website at https://www.scc.virginia.gov/pages/Area-Code-Overlays.

To ensure a continuing supply of telephone numbers, the Missouri Public Service Commission approved the addition of the new 235 area code to the geographic region served by the 573 area code. This process is known as an area code overlay.

What is an area code overlay?

An overlay is the addition of another area code (235) to the same geographic region as an existing area code (573). An overlay does not require customers to change their existing area code but does require using a new dialing procedure to complete local calls.

Who will be affected?

Anyone with a 573 area code telephone number will be affected. The 573 area code currently serves most of the eastern half of Missouri and includes the state capitol of Jefferson City. It serves communities such as Columbia, Cape Girardeau, Farmington, Fort Leonard Wood, Hannibal, Poplar Bluff, Rolla, Sikeston, and many other smaller communities. The new 235 area code will serve the same geographic area currently served by the existing 573 area code.

What will be the new dialing procedure?

The new dialing procedure will require all calls in the 573 area code that are currently dialed with seven digits be dialed using area code + telephone number (10 digits). The same dialing procedure will apply to telephone numbers that are assigned in the new 235 area code.

When will the change begin?

Beginning February 24, 2024, you must dial the area code + telephone number on all calls, including calls within the same area code. On and after this date, if you do not dial the area code + telephone number, your calls will not complete and a recording will instruct you to hang up and dial again, including the area code.

Beginning March 24, 2024, new telephone lines or services may be assigned numbers with the new 235 area code. If you have a 235 area code, you must dial the area code + telephone number or the call will not complete.

What will you need to do?

In addition to dialing the area code + telephone number for all local calls, all services, automatic dialing equipment, or other types of equipment that are programmed to dial a 7-digit number will need to be reprogrammed to include the area code. Some examples include life safety systems and medical monitoring devices, fire or burglar alarm and security systems or gates, PBXs, fax machines, Internet dial-up numbers, speed dialers, call forwarding settings, voicemail services and similar functions, etc. You should update your websites, personal and business stationery, checks, advertising materials, personal and pet ID tags and other such items to ensure the area code is included.

What will remain the same?

• Your telephone number, including current area code.
• The price of a call, coverage area, or other rates and services will not change due to the overlay.
• What is a local call now will remain a local call regardless of the number of digits dialed.
• You can still dial just three digits to reach 911 and 988, as well as 211, 311, 411, 511, 611, 711 or 811, if currently available in your community.

Who may you contact with questions?

If you have any questions regarding information provided in this notice, please call T-Mobile USA at 1-877-453-1304 or visit the Missouri Public Service Commission at: https://psc.mo.gov/Telecommunications/.

To ensure a continuing supply of telephone numbers, the Arkansas Public Service Commission approved the addition of the new 327 area code to the geographic region served by the 870 area code. The 870 area code serves northern, eastern and southern portions of Arkansas that includes, but is not limited to the communities of El Dorado, Mountain Home, Jonesboro, Pine Bluff, Monticello and Magnolia. The new 327 area code will serve the same geographic area currently served by the existing 870 area code.

What is the new dialing procedure?

To complete local calls, the new dialing procedure requires callers to dial area code + telephone number. This means that all calls in the 870 area code that are currently dialed with seven digits will need to be dialed using area code + telephone number. The same dialing procedure will apply to telephone numbers assigned to the new 327 area code.

When will the change become mandatory?

Beginning January 19, 2024, you must use the new dialing procedures for all local calls. On and after this date, if you do not use the new dialing procedures, your calls will not complete, and a recording will instruct you to hang up and dial again including the area code.

On February 20, 2024, new telephone lines or services may be assigned numbers with the new 327 area code. Callers must use the new dialing procedure for local calls in the new 327 area code.

What will you need to do?

In addition to changing your dialing procedure, all services, automatic dialing equipment, or other types of equipment that are programmed with a 7-digit number will need to be reprogrammed to dial the area code and phone number. Some examples are life safety systems and medical monitoring devices, PBXs and fax machines, Internet dial-up numbers, alarm and security systems or gates, ankle monitors, speed dialers, mobile phone contact lists, call forwarding settings, voicemail services, and similar functions. Be sure to check your website, business stationery, advertising materials, personal and business checks, contact information and your personal or pet ID tags to ensure the area code is included in your telephone number.

What will remain the same?

• Your telephone number, including current area code, will not change.
• What is a local call now will remain a local call.
• The price of a call, coverage area, or other rates and services will not change due to the expansion of the overlay.
• You can still dial just three digits to reach 911 and 988.
• If 211, 311, 411, 511, 611, 711 or 811 are currently available in your community, you will continue to dial these codes with just three digits.

Who may you contact with questions?

If you have any questions regarding information provided in this notice, please call T-Mobile USA at 1-877-453-1304 or visit https://apsc.arkansas.gov/utilities/telephone/.

What is the new dialing procedure?

To complete local calls, the new dialing procedure requires callers to dial area code + telephone number. This means that all calls in the 904 area code that are currently dialed with seven digits will need to be dialed using area code + telephone number. The same dialing procedure will apply to telephone numbers assigned to the new 324 area code.

When will the change become mandatory?

Beginning January 29, 2024, you must use the new dialing procedures for all local calls. On and after this date, if you do not use the new dialing procedures, your calls will not complete, and a recording will instruct you to hang up and dial again.

Customers can begin using the new dialing procedure before January 29, 2024.

Who will be affected and when will the change begin?

The 904 area code serves northeast Florida and includes all or most of Nassau, Duval, Baker, Bradford, Clay, St. Johns, and Union counties. The 904 area code serves communities including, but not limited to, Jacksonville, Jacksonville Beach, Middleburg, Yulee, Fernandina Beach, and Orange Park. The new 324 area code will serve the same geographic area currently served by the existing 904 area code.

Why is the Change Necessary?

To ensure a continuing supply of telephone numbers, the 324 area code is being added to the area served by the 904 area code. Since two area codes will now serve the same geographic region, the area code must be used when dialing any telephone number—including calls within the same area code.

Beginning February 26, 2024, new telephone lines or services may be assigned numbers with the new 324 area code. Callers must use the new dialing procedure for local calls in the new 324 area code.

What will you need to do?

In addition to changing your dialing procedure, all services, automatic dialing equipment, or other types of equipment that are programmed with a 7-digit number will need to be reprogrammed to dial the area code and phone number. Some examples are life safety systems and medical monitoring devices, PBXs and fax machines, Internet dial-up numbers, alarm and security systems or gates, speed dialers, mobile phone contact lists, call forwarding settings, voicemail services, and similar functions. Be sure to check your website, business stationery, advertising materials, personal and business checks, contact information and your personal or pet ID tags to ensure the area code is included in your telephone number.

What will remain the same?

• Your telephone number, including current area code, will not change.
• What is a local call now will remain a local call.
• The price of a call, coverage area, or other rates and services will not change due to the expansion of the overlay.
• You can still dial just three digits to reach 911.
• If 211, 311, 411, 511, 611, 711 or 811 are currently available in your community, you will still dial these codes with just three digits.

Who may you contact with questions?

If you have any questions regarding information provided in this notice, please call T-Mobile USA at 1-877-453-1304 or access https://www.psc.state.fl.us/area-code-summaries.

To make sure new telephone numbers are available, the Minnesota Public Utilities Commission approved the addition of the new 924 area code to the geographic region of the 507 area code. This process is known as an area code overlay.

What is an area code overlay?

An overlay is the addition of another area code (924) to the same geographic region as an existing area code (507). An overlay does not require customers to change their existing area code but does require using a new dialing procedure to complete calls.

Who will be affected?

The 507 area code covers southern Minnesota and cities including, but not limited to Albert Lea, Austin, Fairmont, Mankato, Northfield, Rochester, Winona, Worthington, and other smaller communities. Anyone with a 507 area code will need to use a new dialing procedure, but will not have to change their telephone number. New telephone numbers may be assigned in the new 924 area code.

What will be the new dialing procedure?

All calls in the 507 area code geographic area that are currently dialed with seven digits will need to be dialed using area code + telephone number. The same dialing procedure will apply to both 507 telephone numbers and telephone numbers that are assigned in the new 924 area code.

When will the change begin?

Effective January 30, 2024, dial the area code + telephone number whenever you place a call. If you forget and dial just seven digits, your call will still be completed.

Beginning July 30, 2024, you must dial the area code + telephone number on all calls, including calls within your same area code. If you do not dial the area code + telephone number, your call will not be completed, and a recording will instruct you to hang up and dial again, including the area code.

Beginning August 30, 2024, new telephone lines or services may be assigned numbers with the new 924 area code.

What will change?

• Dial the area code + telephone number for local calls.
• All services, automatic dialing equipment, or other types of equipment that are programmed to dial a 7-digit number will need to be reprogrammed to include the area code. Some examples are: life safety systems and medical monitoring devices, fire or burglar alarm and security systems or gates, fax machines, Internet dial-up numbers, speed dialers, call forwarding settings, voicemail services and similar functions, etc. 
• Update your websites, personal and business stationery and checks, advertising materials, personal and pet ID tags and other such items to ensure the area code is included.

What will remain the same?

• Your telephone number, including current area code.
• The price of a call, coverage area, or other rates and services will not change due to the overlay.
• What is a local call now will remain a local call regardless of the number of digits dialed.
• You can still dial just three digits to reach 911 and 988, as well as 211, 311, 411, 511, 611, 711 or 811 if available in your area.

Who may you contact with questions?

If you have any questions regarding information provided in this notice, please call T-Mobile USA at 1-877-453-1304 or access the Minnesota Public Utilities Commission website at: https://mn.gov/puc/.

To ensure a continuing supply of telephone numbers, the Public Service Commission of South Carolina approved the addition of the new 821 area code to the geographic region served by the 864 area code. This process is known as an area code overlay.

What is an area Code Overlay?

An overlay is the addition of another area code (821) to the same geographic region as an existing area code (864). An overlay does not require customers to change their existing area code but does require using a new dialing procedure to complete calls.

Who will be affected?

Anyone with an 864 area code telephone number will be affected. The 864 NPA covers the northern portion of the state and serves the larger cities of Greenville, Spartanburg, Anderson, and many other smaller communities. The new 821 area code will serve the same geographic area currently served by the existing 864 area code.

What will be the new dialing procedure?

The new dialing procedure will require that all calls in the 864 area code that are currently dialed with seven digits will need to be dialed using area code + telephone number. The same dialing procedure will apply to telephone numbers that are assigned in the new 821 area code.

When will the change begin?

Effective January 19, 2024, you should begin dialing the area code + telephone number whenever you place a call. If you forget and dial just seven digits, your call will still be completed. 

Beginning July 19, 2024, you must dial the area code + telephone number on all calls, including calls within the same area code. On and after this date, if you do not dial the area code + telephone number, your calls will not complete and a recording will instruct you to hang up and dial again, including the area code. 

Beginning August 19, 2024, new telephone lines or services may be assigned numbers with the new 821 area code. If you have a number in the new 821 area code, you must dial the area code + telephone number or the call will not complete.

What will you need to do?

In addition to dialing the area code + telephone number for local calls, all services, automatic dialing equipment, or other types of equipment that are programmed to dial a 7-digit number will need to be reprogrammed to include the area code. Some examples are life safety systems and medical monitoring devices, fire or burglar alarm and security systems or gates, PBXs, fax machines, Internet dial-up numbers, speed dialers, call forwarding settings, voicemail services and similar functions, etc. You should update your websites, personal and business stationery and checks, advertising materials, personal and pet ID tags and other such items to ensure the area code is included.

What will remain the same?

• Your telephone number, including current area code, will not change.
• The price of a call, coverage area, or other rates and services will not change due to the overlay.
• What is a local call now will remain a local call regardless of the number of digits dialed.
• You can still dial just three digits to reach 911 and 988, as well as 211, 311, 411, 511, 611, 711 or 811 if available in your area.

Who may you contact with questions?

If you have any questions regarding information provided in this notice, please call T-Mobile USA at 1-877-453-1304 or visit the Public Service Commission of South Carolina at: https://psc.sc.gov/consumer-info/public-information-notices.

To ensure a continuing supply of new telephone numbers, the New York Public Service Commission has approved an all-services area code overlay for the 716 area code region. The 716 area code is in the western portion of New York and includes all or parts of Allegany, Cattaraugus, Chautauqua, Erie and Niagara counties, and serves communities including, but not limited to, Buffalo, Jamestown, Cheektowaga, Tonawanda, Niagara Falls, and West Seneca. The new 624 area code will serve the same geographic area currently served by the existing 716 area code.

What is an Area Code Overlay?

An overlay is the addition of another area code (624) to the same geographic region as an existing area code region (716). The overlay does not require you to change your existing area code or phone number, or how you dial your calls. You will continue to dial the area code and phone number for all local calls, as you do today, within and between the 716 and new 624 area codes.

Who will be affected and when does the new 624 area code become effective?

Beginning November 16, 2023, customers in the 716 area code overlay region may be assigned a number in the new 624 area code when they request new service or an additional line. Customers receiving a 624 area code will be required to dial the area code and phone number for all local calls, just as customers with telephone numbers from the 716 area code do today.

What will you need to do?

Customers in the overlay region should:

• Continue to dial 10 digits for all local calls, including calls within the same area code.
• Continue to identify your telephone number as a 10-digit number, and include the area code when giving the number to friends, family, business associates, customers, etc.
• Ensure that all services, automatic dialing equipment, or other types of equipment recognize the new 624 area code as a valid area code and continue to store or program telephone numbers as 10-digit numbers. Some examples are: stored telephone numbers in contact lists in wireless phones, PBXs, fax machines, Internet dial-up numbers, speed dialers, call forwarding settings, voicemail services, medical alert devices, safety alarm security systems and gates, ankle monitors and other similar equipment.
• Check items such as your website, personal and business stationery and printed checks, advertising materials, contact information, and your personal or pet ID tags to ensure the area code is included.

What will remain the same?

• Your telephone number, including current area code, will not change.
• The price of a call, coverage area, or other rates and services will not change due to the overlay.
• What is a local call now will remain a local call.
• You will continue to dial 10 digits for local calls within and between the overlay area codes, and 1+10 digits for long distance calls.
• You can still dial just three digits to reach 911 and 988, as well as 211, 311, 411, 511, 611, 711, or 811 if those are currently available in your community.

Who may you contact with questions?

If you have any questions regarding information provided in this notice, please visit the New York Public Service Commission website at https://dps.ny.gov/telecommunications.

To ensure a continuing supply of new telephone numbers, the Missouri Public Service Commission has approved an all-services area code overlay for the 816 area code, which serves western Missouri including but not limited to the communities of Kansas City, Blue Springs, Plattsburg, Fillmore, Richmond, Odessa, Harrisonville, and Adrian. The new 975 area code will serve the same geographic area currently served by the existing 816 area code.

What is an area code overlay?

An overlay is the addition of another area code (975) to the same geographic region as an existing area code region (816). The overlay does not require you to change your existing area code or phone number, or how you dial your calls. You will continue to dial the area code and phone number for all local calls, as you do today, within and between the 816 and new 975 area codes.

Who will be affected and when does the new 975 area code become effective?

Beginning October 13, 2023, customers in the 816 area code overlay region may be assigned a number in the new 975 area code when they request new service or an additional line. Customers receiving a 975 area code will be required to dial the area code and phone number for all local calls, just as customers with telephone numbers from the 816 area code do today.

What will you need to do?

Customers in the overlay region should:

• Continue to dial 10 digits for all local calls, including calls within the same area code.
• Continue to identify your telephone number as a 10-digit number, and include the area code when giving the number to friends, family, business associates, customers, etc.
• Ensure that all services, automatic dialing equipment, or other types of equipment recognize the new 975 area code as a valid area code and continue to store or program telephone numbers as 10-digit numbers. Some examples are: stored telephone numbers in contact lists in wireless phones, PBXs, fax machines, Internet dial-up numbers, speed dialers, call forwarding settings, voicemail services, medical alert devices, safety alarm security systems and gates, ankle monitors and other similar equipment.
• Check items such as your website, personal and business stationery and printed checks, advertising materials, contact information, and your personal or pet ID tags to ensure the area code is included.

What will remain the same?

• Your telephone number, including current area code, will not change.
• The price of a call, coverage area, or other rates and services will not change due to the overlay.
• What is a local call now will remain a local call.
• You will continue to dial 10 digits for local calls within and between the overlay area codes, and 1+10 digits for long distance calls.
• You can still dial just three digits to reach 911 and 988, as well as 211, 311, 411, 511, 611, 711, or 811 if those are currently available in your community.

Who may you contact with questions?

If you have any questions regarding information provided in this notice, please visit the Missouri Public Service Commission website at https://psc.mo.gov/Telecommunications/Telephone_NumbersLocal_Dialing.

To ensure a continuing supply of telephone numbers, the Public Service Commission of Wisconsin has approved an all-services overlay for the 608 area code. The 608 area code serves the southwestern portion of the state including communities such as Beloit, Janesville, La Crosse, Middleton, Monroe, Platteville, Stoughton, Sun Prairie, and Wisconsin Dells. It also serves Madison, the state capitol. The new 353 area code will serve the same geographic area currently served by the 608 area code.

What is an area code overlay?

An overlay is the addition of another area code (353) to the same geographic region as an existing area code (608). The overlay does not require you to change your existing area code or phone number, or how you dial your calls. You will continue to dial the area code and phone number for all local calls, as you do today, within and between the 608 and 353 area codes.

Who is affected and when does the new 353 area code become effective?

Beginning September 15, 2023, customers in the 608 area code region may be assigned a number in the new 353 area code when they request new service or an additional line. Customers receiving the 353 area code will be required to dial the area code and phone number for all local calls, just as customers with telephone numbers from the 608 area code do today.

What will you need to do?

Customers in the overlay region should:

• Continue to dial 10 digits for all local calls, including calls within the same area code.
• Continue to identify your telephone number as a 10-digit number, and include the area code when giving the number to friends, family, business associates, customers, etc.
• Ensure that all services, automatic dialing equipment, or other types of equipment recognize the new 353 area code as a valid area code and continue to store or program telephone numbers as 10-digit numbers. Some examples are: stored telephone numbers in contact lists in wireless phones, PBXs, fax machines, Internet dial-up numbers, speed dialers, call forwarding settings, voicemail services, medical alert devices, safety alarm security systems and gates, ankle monitors, and other similar equipment.
• Check items such as your website, personal and business stationery, printed checks, advertising materials, contact information, and your personal or pet ID tags to ensure the area code is included.

What will remain the same?

• Your telephone number, including current area code, will not change.
• The price of a call, coverage area, or other rates and services will not change due to the overlay.
• What is a local call now will remain a local call.
• You will continue to dial 10 digits for local calls within and between the overlay area codes, and 1+10 digits for long distance calls.
• You can still dial just three digits to reach 911 and 988, as well as 211, 311, 411, 511, 611, 711 or 811 if those are currently available in your community.

Who may you contact with questions?

If you have any questions regarding information provided in this notice, please visit the Public Service Commission’s website at https://psc.wi.gov/Pages/ForConsumers/MoreResources/AreaCodeExhaustion.aspx.

To ensure a continuing supply of telephone numbers, the Florida Public Service Commission approved the addition of the new 324 area code to the geographic region served by the 904 area code. This process is known as an area code overlay.

What is an area code overlay?

An overlay is the addition of another area code (324) to the same geographic region as an existing area code (904). An overlay does not require customers to change their existing area code but does require using a new dialing procedure to complete calls.

Who will be affected?

Anyone with a 904 area code telephone number will be affected. The 904 area code serves northeast Florida and includes all or most of Nassau, Duval, Baker, Bradford, Clay, St. Johns, and Union counties. The 904 area code serves communities including, but not limited to, Jacksonville, Jacksonville Beach, Middleburg, Yulee, Fernandina Beach, and Orange Park. The new 324 area code will serve the same geographic area currently served by the existing 904 area code.

What will be the new dialing procedure?

The new dialing procedure will require that all calls in the 904 area code that are currently dialed with seven digits will need to be dialed using area code + telephone number. The same dialing procedure will apply to telephone numbers that are assigned in the new 324 area code. 

When will the change begin?

Effective July 31, 2023, you should begin dialing the area code + telephone number whenever you place a call. If you forget and dial just seven digits, your call will still be completed. 

Beginning January 29, 2024, you must dial the area code + telephone number on all calls, including calls within the same area code. On and after this date, if you do not dial the area code + telephone number, your calls will not complete and a recording will instruct you to hang up and dial again, including the area code. 

Beginning February 26, 2024, new telephone lines or services may be assigned numbers with the new 324 area code. If you have a number in the new 324 area code, you must dial the area code + telephone number or the call will not complete.

What will you need to do?

In addition to dialing the area code + telephone number for local calls, all services, automatic dialing equipment, or other types of equipment that are programmed to dial a 7-digit number will need to be reprogrammed to include the area code. Some examples are life safety systems and medical monitoring devices, fire or burglar alarm and security systems or gates, PBXs, fax machines, Internet dial-up numbers, speed dialers, call forwarding settings, voicemail services and similar functions, etc. You should update your websites, personal and business stationery and checks, advertising materials, personal and pet ID tags and other such items to ensure the area code is included.

What will remain the same?

• Your telephone number, including current area code, will not change.
• The price of a call, coverage area, or other rates and services will not change due to the overlay.
• What is a local call now will remain a local call regardless of the number of digits dialed.
• You can still dial just three digits to reach 911 and 988, as well as 211, 311, 411, 511, 611, 711 or 811 if available in your area.

Who may you contact with questions?

If you have any questions regarding information provided in this notice, please call T-Mobile USA at 1-877-453-1304 or visit Florida Public Service Commission at: https://www.psc.state.fl.us/area-code-summaries.

To ensure a continuing supply of new telephone numbers, the Florida Public Service Commission has approved an all-services area code overlay for the 305/786 area code overlay region, which serves Miami-Dade county and a portion of Monroe county. The 305/786 area code overlay serves communities such as Miami, Doral, the Florida Keys, Fontainebleau, Hialeah, Homestead, Kendall, and other smaller communities. The new 645 area code will serve the same geographic area currently served by the existing 305 and 786 area codes.

What is an area code overlay?

An overlay is the addition of another area code (645) to the same geographic region as existing area codes (305/786). The overlay does not require you to change your existing area code or phone number, or how you dial your calls. You will continue to dial the area code and phone number for all local calls, as you do today, within and between the 305, 786 and 645 area codes.

Who will be affected and when does the new 645 area code become effective?

Beginning August 4, 2023, customers in the 305/786 area code overlay region may be assigned a number in the new 645 area code when they request new service or an additional line. Customers receiving a 645 area code will be required to dial the area code and phone number for all local calls, just as customers with telephone numbers from the 305 and 786 area codes do today. 

What will you need to do?

Customers in the overlay region should:

• Continue to dial 10 digits for all local calls, including calls within the same area code.
• Continue to identify your telephone number as a 10-digit number, and include the area code when giving the number to friends, family, business associates, customers, etc.
• Ensure that all services, automatic dialing equipment, or other types of equipment recognize the new 645 area code as a valid area code and continue to store or program telephone numbers as 10-digit numbers. Some examples are: stored telephone numbers in contact lists in wireless and cordless phones, PBXs, fax machines, Internet dial-up numbers, speed dialers, call forwarding settings, voicemail services, medical alert devices, safety alarm security systems and gates, ankle monitors and other similar equipment.
• Check items such as your website, personal and business stationery and printed checks, advertising materials, contact information, and your personal or pet ID tags to ensure the area code is included.

What will remain the same?

• Your telephone number, including current area code, will not change.
• The price of a call, coverage area, or other rates and services will not change due to the overlay.
• What is a local call now will remain a local call.
• You will continue to dial 10 digits for local calls within and between the overlay area codes, and 1+10 digits for long distance calls.
• You can still dial just three digits to reach 911 and 988, as well as 211, 311, 411, 511, 611, 711 or 811 if those are currently available in your community.

Who may you contact with questions?

If you have any questions regarding information provided in this notice, please visit the Florida Public Service Commission website at https://www.psc.state.fl.us/area-code-summaries.

To ensure a continuing supply of telephone numbers, the Missouri Public Service Commission approved the addition of the new 235 area code to the geographic region served by the 573 area code. This process is known as an area code overlay.

What is an area code overlay?

An overlay is the addition of another area code (235) to the same geographic region as an existing area code (573). An overlay does not require customers to change their existing area code but does require using a new dialing procedure to complete local calls.

Who will be affected?

Anyone with a 573 area code telephone number will be affected. The 573 area code currently serves most of the eastern half of Missouri and includes the state capitol of Jefferson City. It serves communities such as Columbia, Cape Girardeau, Farmington, Fort Leonard Wood, Hannibal, Poplar Bluff, Rolla, Sikeston, and many other smaller communities. The new 235 area code will serve the same geographic area currently served by the existing 573 area code.

What will be the new dialing procedure?

The new dialing procedure will require all calls in the 573 area code that are currently dialed with seven digits be dialed using area code + telephone number (10 digits). The same dialing procedure will apply to telephone numbers that are assigned in the new 235 area code. 

When will the change begin?

Beginning August 26, 2023, you should begin dialing the area code + telephone number whenever you place a call. If you forget and dial just seven digits, your call will still be completed.

Beginning February 24, 2024, you must dial the area code + telephone number on all calls, including calls within the same area code. On and after this date, if you do not dial the area code + telephone number, your calls will not complete and a recording will instruct you to hang up and dial again, including the area code.

Beginning March 24, 2024, new telephone lines or services may be assigned numbers with the new 235 area code. If you have a 235 area code, you must dial the area code + telephone number or the call will not complete.

What will you need to do?

In addition to dialing the area code + telephone number for all local calls, all services, automatic dialing equipment, or other types of equipment that are programmed to dial a 7-digit number will need to be reprogrammed to include the area code. Some examples include life safety systems and medical monitoring devices, fire or burglar alarm and security systems or gates, PBXs, fax machines, Internet dial-up numbers, speed dialers, call forwarding settings, voicemail services and similar functions, etc. You should update your websites, personal and business stationery and checks, advertising materials, personal and pet ID tags and other such items to ensure the area code is included. 

What will remain the same?

• Your telephone number, including current area code, will not change.
• The price of a call, coverage area, or other rates and services will not change due to the overlay.
• What is a local call now will remain a local call regardless of the number of digits dialed.
• You can still dial just three digits to reach 911 and 988, as well as 211, 311, 411, 511, 611, 711 or 811, if currently available in your community.

Who may you contact with questions?

If you have any questions regarding this information, please visit the Missouri Public Service Commission at: https://psc.mo.gov/Telecommunications/.

To ensure a continuing supply of telephone numbers in the Phoenix metropolitan area, the Arizona Corporation Commission has approved the elimination of the area code boundaries between the 480, 602 and 623 in the Phoenix metro area. This boundary elimination overlay does not require customers with a 480, 602 or 623 area codes to change their existing area code or phone number but does require them to include the area code and the seven-digit telephone number on every call, including calls within the same area code.

Who will be affected?

The 602 area code principally serves the City of Phoenix. The 480 area code primarily serves the eastern region including Scottsdale, Chandler and Tempe. The 623 area code is currently assigned to the western and northern most areas including Buckeye, Glendale and Peoria. Everyone within these area codes will be affected by this boundary elimination overlay. With the implementation of the boundary elimination overlay, the Phoenix metropolitan area will be streamlined into a single, unified region, with no separate geographic areas in service, eliminating the need to change your landline number if you move between area codes.

When do I need to start dialing 10-digits?

Beginning August 12, 2023, 10-digit dialing will become mandatory throughout the 480, 602 and 623 area code regions, and calls that do not include the area code will not complete. If you forget and only dial 7 digits, you will hear a recorded message that advises you to include the area code. You will need to hang up and re-dial your call including the area code.

Beginning September 12, 2023, new telephone lines or services in the former ‘geographic’ areas served separately may now be assigned numbers from the area codes in 480, 602 or 623. All area code numbers may be ported throughout the Phoenix metro area since the boundaries between the area codes have been eliminated. As an example, if you or your business moves from Scottsdale to Phoenix, you will no longer be required to change your landline telephone number when moving into a different area code within the Phoenix metro area.

What will you need to do?

In addition to dialing 10-digits for all local calls, you should identify your telephone number as a 10-digit number (area code + 7-digit telephone number), and include the area code when giving the number to friends, family, business associates, and customers, etc. Please ensure all services, such as automatic dialing equipment, or other types of equipment that are programmed to dial a 7-digit number are updated to include the area code. Some examples are life safety systems and medical monitoring devices, PBXs, fax machines, Internet dial-up numbers, alarm and security systems, gates, speed dialers, mobile and cordless phone contact lists, call forwarding settings, voicemail services, and similar functions. Be sure to check your personal and business stationery, checks, advertising materials, websites, and your personal or pet ID tags to ensure the area code is included in your telephone number.

What will remain the same?

• Your telephone number, including the current area code, will not change.
• What is currently a local call will remain a local call regardless of the number of digits dialed. 
• The price of a call or other rates and services will not change.
• You will continue to dial 1+ area code + telephone number for all long-distance calls.
• You can still dial just three digits to reach 911 and 988, as well as 211, 311, 411, 511, 611, 711, or 811, if currently available in your community.

Who may you contact with questions?

If you have any questions regarding information provided in this notice, please visit http://www.azcc.gov/utilities/telephone/all-about-area-codes. 

To ensure a continuing supply of telephone numbers, the Arkansas Public Service Commission approved the addition of the new 327 area code to the geographic region served by the 870 area code. This process is known as an area code overlay.

What is an Area Code Overlay?

An overlay is the addition of another area code (327) to the same geographic region as an existing area code (870). An overlay does not require customers to change

Who will be affected?

Anyone with an 870 area code telephone number will be affected. The 870 area code covers the northern, eastern, and southern portions of Arkansas. The 870 area code serves communities including, but not limited to El Dorado, Mountain Home, Jonesboro, Pine Bluff, Monticello, and Magnolia. The new 327 area code will serve the same geographic area currently served by the existing 870 area code.

What will be the new dialing procedure?

The new dialing procedure will require that all calls in the 870 area code that are currently dialed with seven digits will need to be dialed using area code + telephone number. The same dialing procedure will apply to telephone numbers that are assigned in the new 327 area code. 

When will the change begin?

Effective July 21, 2023, you should begin dialing the area code + telephone number whenever you place a call. If you forget and dial just seven digits, your call will still be completed.

Beginning January 19, 2024, you must dial the area code + telephone number on all calls, including calls within the same area code. On and after this date, if you do not dial the area code + telephone number, your calls will not complete and a recording will instruct you to hang up and dial again, including the area code.

Beginning February 20, 2024, new telephone lines or services may be assigned numbers with the new 327 area code. If you have a number in the new 327 area code, you must dial the area code + telephone number or the call will not complete.

What will you need to do?

In addition to dialing the area code + telephone number for local calls, all services, automatic dialing equipment, or other types of equipment that are programmed to dial a 7-digit number will need to be reprogrammed to include the area code. Some examples are life safety systems and medical monitoring devices, fire or burglar alarm and security systems or gates, PBXs, fax machines, Internet dial-up numbers, speed dialers, call forwarding settings, voicemail services and similar functions, etc. You should update your websites, personal and business stationery and checks, advertising materials, personal and pet ID tags and other such items to ensure the area code is included.

What will remain the same?

• Your telephone number, including current area code, will not change.
• The price of a call, coverage area, or other rates and services will not change due to the overlay.
• What is a local call now will remain a local call regardless of the number of digits dialed.
• You can still dial just three digits to reach 911 and 988, as well as 211, 311, 411, 511, 611, 711 or 811 if available in your area.

Who may you contact with questions?

If you have any questions regarding information provided in this notice, please visit Arkansas Public Service Commission at: https://apsc.arkansas.gov/utilities/telephone/

To ensure a continuing supply of new telephone numbers, the Maryland Public Service Commission has approved an all-services area code overlay for the 240/301 area code region which serves all or portions of Aspen Hill, Bethesda, Bowie, Frederick, Gaithersburg, Germantown, Hagerstown, Potomac, Silver Spring, Waldorf, Wheaton, and many other small communities. The new 227 area code will serve the same geographic area currently served by the existing 240/301 area codes.

What is an Area Code Overlay?

An overlay is the addition of another area code (227) to the same geographic region as an existing area code region (240/301). The overlay does not require you to change your existing area code or phone number, or how you dial your calls. You will continue to dial the area code and phone number for all local calls, as you do today, within and between the 240, 301, and new 227 area codes.

Who will be affected and when does the new 730 area code become effective?

Beginning June 14, 2023, customers in the 240/301 area code overlay region may be assigned a number in the new 227 area code when they request new service or an additional line. Customers receiving a 227 area code will be required to dial the area code and phone number for all local calls, just as customers with telephone numbers from the 240 and 301 area codes do today.

What will you need to do?

Customers in the overlay region should:

• Continue to dial 10 digits for all local calls, including calls within the same area code.
• Continue to identify your telephone number as a 10-digit number, and include the area code when giving the number to friends, family, business associates, customers, etc.
• Ensure that all services, automatic dialing equipment, or other types of equipment recognize the new 227 area code as a valid area code and continue to store or program telephone numbers as 10-digit numbers. Some examples are: stored telephone numbers in contact lists in wireless phones, PBXs, fax machines, Internet dial-up numbers, speed dialers, call forwarding settings, voicemail services, medical alert devices, safety alarm security systems and gates, or other similar equipment.
• Check items such as your website, personal and business stationery and printed checks, advertising materials, contact information, and your personal or pet ID tags to ensure the area code is included.

What will remain the same?

• Your telephone number, including current area code, will not change.
• The price of a call, coverage area, or other rates and services will not change due to the overlay.
• What is a local call now will remain a local call.
• You will continue to dial 10 digits for local calls within and between the overlay area codes, and 1+10 digits for long distance calls.
• You can still dial just three digits to reach 911 and 988, as well as 211, 311, 411, 511, 611, 711 or 811 if those are currently available in your community.

Who may you contact with questions?

If you have any questions regarding information provided in this notice, please visit the Maryland Public Service Commission’s website at https://www.psc.state.md.us/telecommunications/new-227-area-code-coming-to-maryland-june-2023/

To ensure a continuing supply of telephone numbers, the Illinois Commerce Commission has approved an all-services overlay for the 618 area code. The 618 area code serves southern Illinois including the larger cities of Belleview, Granite City, O’Fallon, Alton, East St. Louis, Carbondale, and Collinsville, in addition to many smaller communities. The new 730 area code will serve the same geographic area currently served by the 618 area code.

What is an Area Code Overlay?

An overlay is the addition of another area code (730) to the same geographic region as an existing area code (618). The overlay does not require you to change your existing area code or phone number, or how you dial your calls. You will continue to dial the area code and phone number for all local calls, as you do today, within and between the 618 and 730 area codes.

Who will be affected and when does the new 730 area code become effective?

Beginning July 7, 2023, customers in the 618 area code region may be assigned a number in the new 730 area code when they request new service or an additional line. Customers receiving the 730 area code will be required to dial the area code and phone number for all local calls, just as customers with telephone numbers from the 618 area code do today. 

What will you need to do?

Customers in the overlay region should:

• Continue to dial 10 digits for all local calls, including calls within the same area code.
• Continue to identify your telephone number as a 10-digit number, and include the area code when giving the number to friends, family, business associates, customers, etc.
• Ensure that all services, automatic dialing equipment, or other types of equipment recognize the new 730 area code as a valid area code and continue to store or program telephone numbers as 10-digit numbers. Some examples are: stored telephone numbers in contact lists in wireless phones, PBXs, fax machines, Internet dial-up numbers, speed dialers, call forwarding settings, voicemail services, medical alert devices, safety alarm security systems and gates, ankle monitors and or other similar equipment.
• Check items such as your website, personal and business stationery, printed checks, advertising materials, contact information, and your personal or pet ID tags to ensure the area code is included.

What will remain the same?

• Your telephone number, including current area code, will not change.
• The price of a call, coverage area, or other rates and services will not change due to the overlay.
• What is a local call now will remain a local call.
• You will continue to dial 10 digits for local calls within and between the overlay area codes, and 1+10 digits for long distance calls.
• You can still dial just three digits to reach 911 and 988, as well as 211, 311, 411, 511, 611, 711 or 811 if those are currently available in your community.

Who may you contact with questions?

If you have any questions regarding information provided in this notice, please call T-Mobile USA at 1-877-453-1304 for more information. You can also visit the Illinois Commerce Commission website at icc.illinois.gov/programs/Area-Codes.

To ensure a continuing supply of telephone numbers, the Public Service Commission of Wisconsin has approved an all-services overlay for the 920 area code. The 920 area code serves most of the northeastern portion of the state, including communities such as Appleton, Beaver Dam, Berlin, Fond du Lac, Fort Atkinson, Green Bay, Manitowoc, Oshkosh, Ripon, Sheboygan, Sturgeon Bay and Watertown. The new 274 area code will serve the same geographic area currently served by the 920 area code.

What is an Area Code Overlay?

An overlay is the addition of another area code (274) to the same geographic region as an existing area code (920). The overlay does not require you to change your existing area code or phone number, or how you dial your calls. You will continue to dial the area code and phone number for all local calls, as you do today, within and between the 920 and 274 area codes.

Who will be affected and when does the new 283 area code become effective?

Beginning May 5, 2023, customers in the 920 area code region may be assigned a number in the new 274 area code when they request new service or an additional line. Customers receiving the 274 area code will be required to dial the area code and phone number for all local calls, just as customers with telephone numbers from the 920 area code do today.

What will you need to do?

Customers in the overlay region should:

• Continue to dial 10 digits for all local calls, including calls within the same area code.
• Continue to identify your telephone number as a 10-digit number, and include the area code when giving the number to friends, family, business associates, customers, etc.
• Ensure that all services, automatic dialing equipment, or other types of equipment recognize the new 270 area code as a valid area code and continue to store or program telephone numbers as 10-digit numbers. Some examples are: stored telephone numbers in contact lists in wireless phones, PBXs, fax machines, Internet dial-up numbers, speed dialers, call forwarding settings, voicemail services, medical alert devices, safety alarm security systems and gates, ankle monitors and or other similar equipment.
• Check items such as your website, personal and business stationery, printed checks, advertising materials, contact information, and your personal or pet ID tags to ensure the area code is included.

What will remain the same?

• Your telephone number, including current area code, will not change.
• The price of a call, coverage area, or other rates and services will not change due to the overlay.
• What is a local call now will remain a local call.
• You will continue to dial 10 digits for local calls within and between the overlay area codes, and 1+10 digits for long distance calls.
• You can still dial just three digits to reach 911 and 988, as well as 211, 311, 411, 511, 611, 711 or 811 if those are currently available in your community.

Who may you contact with questions?

If you have any questions regarding information provided in this notice, please call T-Mobile USA at 1-877-453-1304 for more information. You may also visit the Public Service Commission’s website at https://psc.wi.gov/Pages/ForConsumers/MoreResources/AreaCodeExhaustion.aspx.

To ensure a continuing supply of new telephone numbers, the Public Service Commission of Ohio has approved an all-services area code overlay for the 513 area code, which serves southwest Ohio including the communities of Cincinnati, Cleves, Forest Park, Hamilton, Lebanon, Maineville, Mason, Miamitown, Middletown, Norwood, Oxford, Trenton, and West Chester. The new 283 area code will serve the same geographic area currently served by the existing 513 area code.

What is an Area Code Overlay?

An overlay is the addition of another area code (283) to the same geographic region as an existing area code (513). The overlay does not require you to change your existing area code or phone number, or how you dial your calls. You will continue to dial the area code and phone number for all local calls, as you do today, within and between the 513 and new 283 area codes.

Who will be affected and when does the new 283 area code become effective?

Beginning April 28, 2023, customers in the 513 area code overlay region may be assigned a number in the new 283 area code when they request new service or an additional line. Customers receiving a 283 area code will be required to dial the area code and phone number for all local calls, just as customers with telephone numbers from the 513 area code do today.

What will you need to do?

Customers in the overlay region should:

• Continue to dial 10 digits for all local calls, including calls within the same area code.
• Continue to identify your telephone number as a 10-digit number, and include the area code when giving the number to friends, family, business associates, customers, etc.
• Ensure that all services, automatic dialing equipment, or other types of equipment recognize the new 283 area code as a valid area code and continue to store or program telephone numbers as 10-digit numbers. Some examples are: stored telephone numbers in contact lists in wireless phones, PBXs, fax machines, Internet dial-up numbers, speed dialers, call forwarding settings, voicemail services, medical alert devices, safety alarm security systems and gates, ankle monitors and or other similar equipment.
• Check items such as your website, personal and business stationery and printed checks, advertising materials, contact information, and your personal or pet ID tags to ensure the area code is included.

What will remain the same?

• Your telephone number, including current area code, will not change.
• The price of a call, coverage area, or other rates and services will not change due to the overlay.
• What is a local call now will remain a local call.
• You will continue to dial 10 digits for local calls within and between the overlay area codes, and 1+10 digits for long distance calls.
• You can still dial just three digits to reach 911 and 988, as well as 211, 311, 411, 511, 611, 711, or 811 if those are currently available in your community.

Who may you contact with questions?

If you have any questions regarding information provided in this notice, please call T-Mobile USA at 1-877-453-1304 for more information. You can also visit the Public Service Commission of Ohio website at: https://puco.ohio.gov/utilities/telecom.

The California Public Utilities Commission (CPUC) will begin the process to introduce a new area code to the area now served by the 559 area code, as the 559 area code is expected to be depleted of phone numbers by September 2025. The telecommunications service providers have proposed to introduce the new area code using the overlay method. Adding a new area code to the area now served by the 559 area code will provide additional prefixes and new telephone numbers for the 559 customers. The proposed overlay, pending CPUC approval, will allow all customers to keep their current phone numbers, including their area code.

The CPUC has made available a recorded webcast to inform the public about the new area code addition. Topics to be discussed in the recorded webcast include: (1) History of the 559 area code; (2) Area code relief process; (3) Area code relief methods; (4) Effects of the proposed overlay; and (5) Implementation timeline of the proposed overlay. The recorded webcast will be available to view and download at https://www.cpuc.ca.gov/AreaCodes/ beginning April 4, 2023. Comments about the information presented in the webcast may be submitted to the CPUC Numbering Staff by e-mail at Numbering_Help@cpuc.ca.gov, or by postal mail to 505 Van Ness Ave., San Francisco, CA 94102 by May 4, 2023.

To ensure a continuing supply of telephone numbers, the Illinois Commerce Commission has approved an all-services overlay for the 309 area code. The 309 area code serves the west-central portion of the state, including all or part of Bureau, Dewitt, Fulton, Hancock, Henderson, Henry, Knox, Marshall, Mason, McDonough, McLean, Mercer, Peoria, Rock Island, Schuyler, Stark, Tazewell, Warren, Whiteside, and Woodford counties. The 309 area code serves cities and communities such as Bloomington, Canton, East Moline, East Peoria, Galesburg, Macomb, Moline, Normal, Pekin, Peoria, and Rock Island, as well as many other smaller communities. The new 861 area code will serve the same geographic area currently served by the 309 area code.

What is an Area Code Overlay?

An overlay is the addition of another area code (861) to the same geographic region as an existing area code (309). The overlay does not require you to change your existing area code or phone number, or how you dial your calls. You will continue to dial the area code and phone number for all local calls, as you do today, within and between the 309 and 861 area codes.

Who is affected and when does the new 861 area code become effective?

Beginning February 24, 2023, customers in the 309 area code region may be assigned a number in the new 861 area code when they request new service or an additional line. Customers receiving the 861 area code will be required to dial the area code and phone number for all local calls, just as customers with telephone numbers from the 309 area code do today. 

What will you need to do?

Customers in the overlay region should:

• Continue to dial 10 digits for all local calls, including calls within the same area code.
• Continue to identify your telephone number as a 10-digit number, and include the area code when giving the number to friends, family, business associates, customers, etc.
• Ensure that all services, automatic dialing equipment, or other types of equipment recognize the new 861 area code as a valid area code and continue to store or program telephone numbers as 10-digit numbers. Some examples are: stored telephone numbers in contact lists in wireless phones, PBXs, fax machines, Internet dial-up numbers, speed dialers, call forwarding settings, voicemail services, medical alert devices, safety alarm security systems and gates, ankle monitors and or other similar equipment.
• Check items such as your website, personal and business stationery, printed checks, advertising materials, contact information, and your personal or pet ID tags to ensure the area code is included.

What will remain the same?

• Your telephone number, including current area code, will not change.
• The price of a call, coverage area, or other rates and services will not change due to the overlay.
• What is a local call now will remain a local call.
• You will continue to dial 10 digits for local calls within and between the overlay area codes, and 1+10 digits for long distance calls.
• You can still dial just three digits to reach 911 and 988, as well as 211, 311, 411, 511, 611, 711 or 811 if those are currently available in your community.

Who may you contact with questions?

If you have any questions regarding information provided in this notice, please call T-Mobile USA at 1-877-453-1304 for more information. You may also visit the Illinois Commerce Commission website at https://www.icc.illinois.gov/programs/Area-Codes.

To ensure a continuing supply of new telephone numbers, the New York Public Service Commission has approved an all-services area code overlay for the 845 area code region. The 845 area code serves all or parts of Columbia, Delaware, Dutchess, Greene, Orange, Putnam, Rockland, Sullivan, and Ulster counties, including a portion of Westchester County. The new 329 area code will serve the same geographic area currently served by the existing 845 area code.

What is an Area Code Overlay?

An overlay is the addition of another area code (329) to the same geographic region as an existing area code region (845). The overlay does not require you to change your existing area code or phone number, or how you dial your calls. You will continue to dial the area code and phone number for all local calls, as you do today, within and between the 845 and new 329 area codes.

Who will be affected and when does the new 329 area code become effective?

Beginning March 24, 2023, customers in the 845 area code overlay region may be assigned a number in the new 329 area code when they request new service or an additional line. Customers receiving a 329 area code will still be required to dial the area code and phone number for all local calls, just as customers with telephone numbers from the 845 area code do today.

What will you need to do?

Customers in the overlay region should:

• Continue to dial 10 digits for all local calls, including calls within the same area code.
• Continue to identify your telephone number as a 10-digit number, and include the area code when giving the number to friends, family, business associates, customers, etc.
• Ensure that all services, automatic dialing equipment, or other types of equipment recognize the new 329 area code as a valid area code and continue to store or program telephone numbers as 10-digit numbers. Some examples are: stored telephone numbers in contact lists in wireless phones, PBXs, fax machines, Internet dial-up numbers, speed dialers, call forwarding settings, voicemail services, medical alert devices, safety alarm security systems and gates, ankle monitors and or other similar equipment.
• Check items such as your website, personal and business stationery and printed checks, advertising materials, contact information, and your personal or pet ID tags to ensure the area code is included.

What will remain the same?

• Your telephone number, including current area code, will not change.
• The price of a call, coverage area, or other rates and services will not change due to the overlay.
• What is a local call now will remain a local call.
• You will continue to dial 10 digits for local calls within and between the overlay area codes, and 1+10 digits for long distance calls.
• You can still dial just three digits to reach 911 and 988, as well as 211, 311, 411, 511, 611, 711, or 811 if those are currently available in your community.

Who may you contact with questions?

If you have any questions regarding information provided in this notice, please call T-Mobile USA at 1-877-453-1304 for more information. You can also visit the New York Public Service Commission website at https://www3.dps.ny.gov/W/PSCWeb. 

To ensure a continuing supply of telephone numbers, the Florida Public Service Commission has approved an all-services overlay for the 561 area code. The 561 area code serves Belle Glade, Boca Raton, Boynton Beach, Delray Beach, Jupiter, Palm Beach, and Wellington, as well as other smaller communities. The new 728 area code will serve the same geographic area currently served by the 561 area code.

What is an Area Code Overlay?

An overlay is the addition of another area code (728) to the same geographic region as an existing area code (561). The overlay does not require you to change your existing area code or phone number, or how you dial your calls. You will continue to dial the area code and phone number for all local calls, as you do today, within and between the 561 and 728 area codes.

Who is affected and when does the new 728 area code become effective?

Beginning March 10, 2023, customers in the 561 area code region may be assigned a number in the new 728 area code when they request new service or an additional line. Customers receiving the 728 area code will be required to dial the area code and phone number for all local calls, just as customers with telephone numbers from the 561 area code do today.

What will you need to do?

Customers in the overlay region should:

• Continue to dial 10 digits for all local calls, including calls within the same area code.
• Continue to identify your telephone number as a 10-digit number, and include the area code when giving the number to friends, family, business associates, customers, etc.
• Ensure that all services, automatic dialing equipment, or other types of equipment recognize the new 728 area code as a valid area code and continue to store or program telephone numbers as 10-digit numbers. Some examples are: stored telephone numbers in contact lists in wireless phones, PBXs, fax machines, Internet dial-up numbers, speed dialers, call forwarding settings, voicemail services, medical alert devices, safety alarm security systems and gates, ankle monitors and or other similar equipment.
• Check items such as your website, personal and business stationery, printed checks, advertising materials, contact information, and your personal or pet ID tags to ensure the area code is included.

What will remain the same?

• Your telephone number, including current area code, will not change.
• The price of a call, coverage area, or other rates and services will not change due to the overlay.
• What is a local call now will remain a local call.
• You will continue to dial 10 digits for local calls within and between the overlay area codes, and 1+10 digits for long distance calls.
• You can still dial just three digits to reach 911 and 988, as well as 211, 311, 411, 511, 611, 711 or 811 if those are currently available in your community.

Who may you contact with questions?

If you have any questions regarding information provided in this notice, please call T-Mobile USA at 1-877-453-1304 for more information. You can also visit the Florida Public Service Commission website at https://www.psc.state.fl.us/area-code-summaries. 

To ensure a continuing supply of telephone numbers, the California Public Utilities Commission has approved an all-services overlay for the 707 area code region. The 707 area code serves all or portions of Del Norte, Glenn, Humboldt, Lake, Marin, Mendocino, Napa, Solano, Sonoma, Tehama and Trinity counties, and encompasses cities such as American Canyon, Arcata, Benicia, Calistoga, Clearlake, Cloverdale, Cotati, Crescent City, Dixon, Eureka, Fairfield, Ferndale, Fort Bragg, Healdsburg, Lakeport, Napa, Petaluma, Point Arena, Rio Dell, Rio Vista, Rohnert Park, Saint Helena, Santa Rosa, Sebastopol, Sonoma, Suisun City, Trinidad, Ukiah, Vacaville, Vallejo, Windsor, Willits, and Yountville. The new 369 area code will serve the same geographic area currently served by the 707 area code.

What is an Area Code Overlay?

An overlay is the addition of another area code (369) to the same geographic region as an existing area code (707). The overlay does not require you to change your existing area code or phone number, or how you dial your calls. You will continue to dial 1+10 digits (area code + phone number) for all local calls, as you do today, within and between the 707 and 369 area codes. Mobile phone customers will continue to dial either 10 digits or 1+10 digits.

What will you need to do?

Customers in the overlay region should:

• Continue to dial 1+10 digits for all local calls, including calls within the same area code.
• Continue to identify your telephone number as a 10-digit number, and include the area code when giving the number to friends, family, business associates, customers, etc.
• Ensure that all services, automatic dialing equipment, or other types of equipment recognize the new 369 area code as a valid area code and continue to store or program telephone numbers as 10-digit numbers. Some examples are: stored telephone numbers in contact lists in wireless phones, PBXs, fax machines, Internet dial-up numbers, speed dialers, call forwarding settings, voicemail services, medical alert devices, safety alarm security systems and gates, ankle monitors and/or other similar equipment.
• Check items such as your website, personal and business stationery, printed checks, advertising materials, contact information, and your personal or pet ID tags to ensure the area code is included.

What will remain the same?

• Your telephone number, including the current area code, will not change.
• The price of a call, coverage area, or other rates and services will not change due to the overlay.
• What is a local call now will remain a local call.
• You will continue to dial 1+10 digits for local calls within and between the overlay area codes, and 1+10 digits for long distance calls.
• You can still dial just three digits to reach 911 and 988, as well as 211, 311, 411, 511, 611, 711 or 811 if those are currently available in your community.

Who may you contact with questions?

If you have any questions regarding information provided in this notice, please call T-Mobile USA at 1-877-453-1304 for more information. You can also visit the California Public Utilities Commission website at https://www.cpuc.ca.gov/707areacode. 

To ensure a continuing supply of telephone numbers in the Phoenix metropolitan area, the Arizona Corporation Commission has approved the elimination of area code boundaries between the 480, 602 and 623 area codes in the Phoenix metro area.

What is boundary elimination overlay?

A boundary elimination overlay for the Phoenix metro area means the three area codes serving the Phoenix metro area will all serve the same geographic area, there will no longer be a boundary between the 480, 602 and 623 area codes and the three area codes will all serve the same combined geographic region. A boundary elimination overlay does not require you to change your existing area code or phone number but will require you to include the area code when dialing all calls, including local calls.

Who will be affected?

The boundary elimination overlay between 480, 602 and 623 area codes will affect callers in the Phoenix metro area which includes but is not limited to the communities of Avondale, Chandler, Gilbert, Glendale, Mesa, Phoenix, Scottsdale, Sun City, Sun Lakes, Tempe, and Tolleson.

When will the change begin?

Beginning February 11, 2023, anyone with a 602 or 623 area code should begin using 10 digits (area code + phone number) when dialing all local calls (Mandatory 10-digit dialing has already been implemented in the 480 area code). This includes all local calls which currently allow 7-digit dialing. During the permissive 10-digit dialing period, if you forget and only dial 7 digits, your calls will still complete. The permissive 10-digit dialing period will remain in place until August 12, 2023.

Beginning August 12, 2023, 10-digit dialing will become mandatory for anyone with a 602 and 623 area code, and their calls that do not include the area code will not complete. If you forget and only dial 7 digits, you will hear a recorded message that advises you to include the area code, and you will need to hang up and re-dial your call including the area code.

What will you need to do?

In addition to dialing 10-digits for all local calls, you should identify your telephone number as a 10-digit number (area code + 7-digit telephone number), and include the area code when giving the number to friends, family, business associates, and customers, etc. Please ensure all services, such as automatic dialing equipment, or other types of equipment that are programmed to dial a 7-digit number are updated to include the area code. Some examples are life safety systems and medical monitoring devices, PBXs, fax machines, Internet dial-up numbers, alarm and security systems, gates, speed dialers, mobile and cordless phone contact lists, call forwarding settings, voicemail services, and similar functions. Be sure to check your personal and business stationery, checks, advertising materials, websites, and your personal or pet ID tags to ensure the area code is included in your telephone number.

What will remain the same?

• Your telephone number, including the current area code, will not change.
• What is currently a local call will remain a local call regardless of the number of digits dialed.
• The price of a call or other rates and services will not change.
• You will continue to dial 1+ area code + telephone number for all long-distance calls.
• You can still dial just three digits to reach 911 and 988, as well as 211, 311, 411, 511, 611, 711, or 811, if currently available in your community.

Who may you contact with questions?

If you have any questions regarding information provided in this notice, please call T-Mobile USA at 1-877-453-1304 or the following web site for more information: https://www.azcc.gov/utilities/telephone/all-about-area-codes. 

The California Public Utilities Commission (CPUC) will begin the process to introduce a new area code to the area now served by the 530 area code, as the 530 area code is expected to be depleted of phone numbers by September 2025. Pending approval by the CPUC, the new area code will be introduced on top of the 530 area code using the overlay method.

The CPUC has made available a recorded webcast to inform the public about the overlay. Topics to be discussed in the recorded webcast include: (1) History of the 530 area code; (2) Area code relief process; (3) Overlay relief method; (4) Effects of the pending overlay; and (5) Implementation periods. The recorded webcast will be available to view and download at https://www.cpuc.ca.gov/AreaCodes/ beginning January 6, 2023. Comments about the information presented in the webcast may be submitted to the CPUC Public Advisor's Office by email at public.advisor@cpuc.ca.gov, or by postal mail to 320 W. 4th Street, Suite 500, Los Angeles, CA 90013 by March 6, 2023.

To ensure a continuing supply of new telephone numbers, the New York Public Service Commission has approved an all-services area code overlay for the 516 area code region. The 516 area code comprises the entirety of Nassau County on the western portion of Long Island including the cities of Long Beach and Glen Cove, the Towns of Hempstead, North Hempstead, and Oyster Bay, and various villages within the Towns. The new 363 area code will serve the same geographic area currently served by the existing 516 area code.

What is an Area Code Overlay?

An overlay is the addition of another area code (363) to the same geographic region as an existing area code region (516). The overlay does not require you to change your existing area code or phone number, or how you dial your calls. You will continue to dial the area code and phone number for all local calls, as you do today, within and between the 516 and new 363 area codes.

Who is affected and when does the new 350 area code become effective?

Beginning January 20, 2023, customers in the 516 area code overlay region may be assigned a number in the new 363 area code when they request new service or an additional line. Customers receiving a 363 area code will be required to dial the area code and phone number for all local calls, just as customers with telephone numbers from the 516 area code do today.

What will you need to do?

Customers in the overlay region should:

• Continue to dial 10 digits for all local calls, including calls within the same area code.
• Continue to identify your telephone number as a 10-digit number, and include the area code when giving the number to friends, family, business associates, customers, etc.
• Ensure that all services, automatic dialing equipment, or other types of equipment recognize the new 363 area code as a valid area code and continue to store or program telephone numbers as 10-digit numbers. Some examples are: stored telephone numbers in contact lists in wireless phones, PBXs, fax machines, Internet dial-up numbers, speed dialers, call forwarding settings, voicemail services, medical alert devices, safety alarm security systems and gates, ankle monitors and or other similar equipment.
• Check items such as your website, personal and business stationery and printed checks, advertising materials, contact information, and your personal or pet ID tags to ensure the area code is included.

What will remain the same?

• Your telephone number, including current area code, will not change.
• The price of a call, coverage area, or other rates and services will not change due to the overlay.
• What is a local call now will remain a local call.
• You will continue to dial 10 digits for local calls within and between the overlay area codes, and 1+10 digits for long distance calls.
• You can still dial just three digits to reach 911, as well as 211, 311, 411, 511, 611, 711, 811, or 988 if those are currently available in your community.

Who may you contact with questions?

If you have any questions regarding information provided in this notice, please call T-Mobile USA at 1-877-453-1304 for more information. You can also visit the New York Public Service Commission website at https://www.dps.ny.gov/.

The California Public Utilities Commission (CPUC) will begin the process to introduce a new area code to the 213/323 area codes, as the supply of available phone numbers in the 213/323 area code region is expected to be depleted by June 2025. Pending approval by the CPUC, the new area code will be introduced on top of the 213/323 area code region.

The 213/323 area code region was formed in 2017 when the 323 area code underwent an overlay that eliminated the boundary between the 213 area code region and the neighboring 323 area code region. The resulting combined 213/323 region is thus served by both the 213 and the 323 area codes. The new area code, if approved by the CPUC, will be the third area code for the region.

The CPUC has made available a recorded webcast to inform the public about the new area code. Topics to be discussed in the recorded webcast include: (1) History of the 213/323 area code; (2) Area code relief process; (3) Overlay relief method; (4) Effects of the pending overlay; and (5) Implementation periods. The recorded webcast will be available at https://www.cpuc.ca.gov/AreaCodes/ beginning November 18, 2022. Comments about the addition of the new area code may be submitted to the CPUC Public Advisor's Office by e-mail at public.advisor@cpuc.ca.gov, or by postal mail to 505 Van Ness Ave., San Francisco, CA 94102 by January 18, 2023. A copy of the webcast presentation slides may be requested by contacting the CPUC Public Advisor's Office by email at public.advisor@cpuc.ca.gov, or by phone at (866)849-8390.

To ensure a continuing supply of telephone numbers, the California Public Utilities Commission has approved an all-services overlay for the 209 area code region. The 209 area code serves all or portions of Alameda, Alpine, Amador, Calaveras, Eldorado, Fresno, Madera, Mariposa, Merced, Sacramento, San Joaquin, Stanislaus, and Tuolumne counties, and encompasses cities such as Angels Camp, Atwater, Ceres, Dos Palos, Escalon, Galt, Gustine, Hughson, Ione, Lathrop, Livingston, Lodi, Los Banos, Manteca, Merced, Modesto, Newman, Oakdale, Patterson, Plymouth, Ripon, Riverbank, Sonora, Stockton, Tracy, Turlock, and Waterford. The 209 area code also covers Yosemite National Park and Kirkwood Mountain Resort. The new 350 area code will serve the same geographic area currently served by the 209 area code.

What is an Area Code Overlay?

An overlay is the addition of another area code (350) to the same geographic region as an existing area code (209). The overlay does not require you to change your existing area code or phone number, or how you dial your calls. You will continue to dial 1+10 digits (area code + phone number) for all local calls, as you do today, within and between the 209 and 350 area codes. Mobile phone customers will continue to dial either 10 digits or 1+10 digits.

Who is affected and when does the new 350 area code become effective?

Beginning November 28, 2022, customers in the 209 area code region may be assigned a number in the new 350 area code when they request new service or an additional line. Customers receiving the 350 area code will be required to dial the 1+10 digits for all local calls, just as customers with telephone numbers from the 209 area code do today. Mobile phone customers receiving 350 numbers may dial either 10 digits or 1+10 digits.

What will you need to do?

Customers in the overlay region should:

• Continue to dial 1+10 digits for all local calls, including calls within the same area code.
• Continue to identify your telephone number as a 10-digit number, and include the area code when giving the number to friends, family, business associates, customers, etc.
• Ensure that all services, automatic dialing equipment, or other types of equipment recognize the new 350 area code as a valid area code and continue to store or program telephone numbers as 10-digit numbers. Some examples are: stored telephone numbers in contact lists in wireless phones, PBXs, fax machines, Internet dial-up numbers, speed dialers, call forwarding settings, voicemail services, medical alert devices, safety alarm security systems and gates, ankle monitors and/or other similar equipment.
• Check items such as your website, personal and business stationery, printed checks, advertising materials, contact information, and your personal or pet ID tags to ensure the area code is included.

What will remain the same?

• Your telephone number, including the current area code, will not change.
• The price of a call, coverage area, or other rates and services will not change due to the overlay.
• What is a local call now will remain a local call.
• You will continue to dial 1+10 digits for local calls within and between the overlay area codes, and 1+10 digits for long distance calls.
• You can still dial just three digits to reach 911 and 988, as well as 211, 311, 411, 511, 611, 711, or 811 if those are currently available in your community.

Who may you contact with questions?

If you have any questions regarding information provided in this notice, please call T-Mobile USA at 1-877-453-1304 or access https://www.t-mobile.com/customers/area-code-splits-overlays for more information. You can also visit the California Public Utilities Commission website at https://www.cpuc.ca.gov/209areacode.