Area Code Overlay Approved for the Pennsylvania 717 Area Code

Area Code Overlay Approved for the Pennsylvania 717 Area Code


To ensure a continuing supply of telephone numbers, the new 223 area code will be added to the area served by 717. This is known as an area code overlay. Get ready to change the way you dial your local calls!

What's an area code overlay?

An overlay adds another area code (223) to the same geographic region as an existing area code (717). An overlay does not require customers to change their existing area code or telephone number.

Who is affected?

The 717 area code covers the south-central portion of the state serving communities such as Gettysburg, Harrisburg, Lancaster, Lebanon, and York. The new 223 area code will serve the same geographic area currently served by the existing 717 area code.

What is the new dialing procedure?

To complete local calls within the 717 area code region, the new dialing procedure requires callers to dial area code + telephone number. This means that all calls in the 717 area code that are currently dialed with seven digits will need to be dialed using 10 digits, that is, the area code + telephone number. The same dialing procedure will apply to telephone numbers assigned to the new 223 area code.

When does the change begin?

Effective immediately you can begin using 10 digits whenever you place a local call from the 717 area code. If you forget and dial just seven digits, your call will be completed until August 26, 2017.

Starting August 26, 2017, you must use 10-digit dialing for your call to complete. If you don’t, your call won’t be completed and a recording will instruct you to hang up and dial again.

Beginning September 26, 2017, new customers in the 717 geographical area may be assigned telephone numbers with the new 223 area code. All calls made within and between area codes 717 and 223 must be placed using the 10-digit telephone number (717 or 223 plus the 7-digit telephone number).

What do I need to do?

In addition to changing your dialing procedures, 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 use the new dialing procedure. 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. Be sure to check your website, business stationery, advertising materials, personal and business printed checks, 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 regardless of the number of digits dialed.
  • You will continue to dial 1+ area code + telephone number for all calls to other area codes (outside of 717 and 223).
  • 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 at 1-800-937-8997 or access for more information. You can also visit the Pennsylvania Public Utility Commission’s website at for further information.