Mandatory 10-Digit Dialing | Metro by T-Mobile

 If your area code is included in this list, you will need to dial the area code for all local calls starting October 24, 2021

State Area Code State Area Code
Alaska  907 Minnesota 218, 952 
Alabama          251 Mississippi 662
Arkansas           501 Missouri  314, 417, 660, 816
Arizona        480, 520, 928 Montana 406
California        209, 530, 562, 626, 650, 707, 925, 949, 951 Nevada 775
Colorado   719, 970 New Hampshire 603
Deleware     302 New Jersey 856, 908
Florida      321 (Brevard County), 352, 561, 941 New Mexico 505, 575
Georgia           478, 912 New York  516, 607, 716, 845, 914 
Guam       671 North Carolina 910
Hawaii     808 Ohio 440, 513
Illinois              309, 618, 708 South Dakota  605
Indiana    219, 574 Tennesseee 731, 865
Iowa     319, 515 Texas  254, 361, 409, 806, 860, 915, 940
Kanas     610, 785 Vermont   802
Kentucky       859  Virginia  276, 804
Louisiana  337, 504 Washington   509
Michigan     616, 810, 906, 989 Wisconsin 262, 414, 608, 920 

The Federal Communications Commission (FCC) has adopted 988 as a new three-digit number to be used nationwide to reach the National Suicide Prevention and Mental Health Crisis Lifeline.

In order to support nationwide deployment of 988, mandatory 10-digit local dialing will be implemented. If your area code is included in the list above, you will need to dial the area code for all local calls starting on October 24, 2021.

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 and dial again using the area code and the 7-digit number.

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 you contact with questions?

If you have any questions regarding information provided in this notice, please call Metro by T-Mobile at 1-888-8METRO-8. You can also visit the FCC website at