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If you are experiencing a suicidal crisis or emotional distress call 1-800-273-TALK (8255).

On July 16, 2022, the FCC is introducing a new 3-digit dialing code, 988, which requires a 10-digit dialing pattern. T-Mobile has implemented this dialing change to allow all customers to use the FCC’s new dialing code.



Get help now

Dial 1-800-273-TALK (8255) to reach the National Suicide Prevention and Mental Health Crisis Lifeline.

  • All customers can use this number to receive assistance.
  • In order to support nationwide deployment of 988, 10-digit local dialing must first be implemented in the area codes below.

If your area code is included in the list below you are required to use the full 10-digit phone number for all local calls starting October 24, 2021.

Area codes by state
Alaska   907 Mississippi  662
Alabama   251 Missouri  314, 417, 660, 816
Arkansas   501 Montana   406
Arizona    480, 520, 928 Nevada   775
California   209, 530, 562, 626, 650, 707, 925, 949, 951 New Hampshire   603
Colorado   719, 970 New Jersey  856, 908
Delaware 302 New Mexico  505, 575
Florida   321(BrevardCounty), 352, 561, 941 New York  516, 607, 716, 845, 914
Georgia   478, 912 North Carolina    910
Guam   671 North Dakota  701
Hawaii   808 Ohio  440, 513
Illinois   309, 618, 708 South Dakota   605
Indiana   219, 574 Tennessee  731, 865
Iowa 319, 515 Texas  254, 361, 409, 806, 830, 915, 940
Kansas 620, 785 Vermont    802
Kentucky 859 Virginia   276, 804
Louisiana 337, 504 Washington   509
Michigan   616, 810, 906, 989 Wisconsin  262, 414, 608, 920
Minnesota 218, 952       


Mandatory 10-Digit Dialing FAQs

What will be the new dialing procedure?

To complete all local calls, you will now need to dial area code + telephone number. This applies to all calls within your area code that are currently dialed with seven digits.

Who will be affected?

Anyone with a telephone number from your area code will need to make this change from 7-digit local dialing to 10-digit local dialing.

When will the change begin?

Beginning October 24, 2021, you must dial 10-digits (area code + telephone number) for all local calls. On and after this date, local calls dialed with only 7-digits may not be completed, and a recording will inform you that your call cannot be completed as dialed.  You must hang up and dial again using the area code and the 7-digit number.

Beginning July 16, 2022, dialing “988” will route your call to the National Suicide Prevention and Mental Health Crisis Lifeline.

What will you need to do?

In addition to changing the way you dial local calls, all services, automatic dialing equipment, or other types of equipment that are programmed to complete calls to 7-digit local numbers will need to be reprogrammed to complete calls to 10-digit numbers. Some examples are life safety systems or medical monitoring devices, PBXs, fax machines, Internet dial-up numbers, fire or burglar alarm and security systems or gates, speed dialers, mobile or other wireless phone contact lists, call forwarding settings, voicemail services and other similar functions. Be sure to check your website, personal and business stationery, advertising materials, personal and business checks, contact information, your personal or 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 dialing change.
  • What is a local call now will remain a local call regardless of the number of digits dialed.
  • You will continue to dial 1+ area code + telephone number for all long-distance calls.
  • You can still dial just three digits to reach 711 (relay services) and 911 (emergency services).
  • Any 211, 311, 411, 511, 611, or 811 services available in your community can still be reached by dialing their three-digit codes.
  • The National Suicide Prevention Lifeline can still be reached by dialing 1-800-273-TALK (8255)

Who may I contact with questions?

If you have any questions regarding information provided in this notice, please call 888-211-4727 for mobile service or 877-877-8748 for wireline/landline service. You can also visit the FCC website at

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