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Learn about area code and 10-digit dialing updates

New area codes are being added in certain states. Find out how these updates may affect you.


New area code notices and procedures

Communications technology in the U.S. has exploded in recent years. In addition to growth in home and business telephones, there has also been an increase in wireless and other communication devices. Because of this growth, we’re running out of telephone numbers.

In some areas, the need for new numbers is so great that new area codes are being added. There is more than one type of solution in these conditions; however, the majority involve an Area Code Overlay. An overlay is the addition of another area code to the same geographic region as an existing area code. An overlay doesn’t require customers to change their existing area code or telephone number.

The following state list is area codes that require 10-digit dialing, even for local calls. For information on recent area code activities and how they may affect you, review your state and area code. Area codes with more recent activity include a customer notification with more information about changes.

  • New area codes are constantly being added, which may affect the way that you make your outgoing phone calls.
  • Depending on where you live, you may need to use a 10-digit number instead of a 7-digit number to make local calls.
  • Remember to update telephone numbers for services such as 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 procedures.

State list with area code updates

Alabama

Alaska

907

Arizona

  • 480/602/623
  • 520/928

Arkansas

  • 327/870
  • 501

California

Colorado

Delaware

302

Florida

  • 305/786/645
  • 321/407/689
  • 352/941
  • 448/850
  • 561/728
  • 656/813
  • 754/954
  • 904/324

Georgia

  • 404/470/678/770/943
  • 478/912
  • 706/762

Hawaii

808

Idaho

208/986

Illinois

  • 217/447
  • 219/708
  • 224/847
  • 309/861
  • 312/773/872
  • 331/630
  • 618/730
  • 779/815

Indiana

  • 317/463
  • 574
  • 812/930

Iowa

319/515

Kansas

620/785

Kentucky

  • 270/364
  • 859

Louisiana

Maryland

240/301/227

Michigan

Minnesota

  • 218/952
  • 507/924

Mississippi

Missouri

  • 235/573
  • 314/417/660/816
  • 557
  • 816/975

Montana

406

Nevada

  • 702/725
  • 775

New Hampshire

603

New Jersey

  • 201/551
  • 609/640
  • 732/848
  • 856/908
  • 862/973

New Mexico

505/575

New York

  • 212/332/646/917
  • 315/680
  • 329/845
  • 347/718/929
  • 363/516/607/914
  • 518/838
  • 624/716/845
  • 631/934

North Carolina

  • 336/743
  • 704/980
  • 910/472
  • 919/984

Ohio

  • 220/740
  • 234/330
  • 326/937
  • 380/614
  • 419/567
  • 440/436
  • 513/283

Oklahoma

  • 405/572
  • 539/918

Pennsylvania

  • 215/267/445
  • 223/717
  • 272/570
  • 412/724/878
  • 484/610/835
  • 582/814

South Carolina

  • 803/839
  • 843/854
  • 864/821

South Dakota

605

Tennessee

Texas

Vermont

802

Virginia

  • 276/804
  • 540/826
  • 757/948
  • 804/686

Washington, DC

202/771

Washington

Wisconsin

  • 262/414/608
  • 534/715
  • 608/353
  • 920/274

The addition of new area codes won't affect the price of telephone calls placed over AT&T networks.

Note: Dialing 911 and calls to directory assistance aren't affected by the updates. If 211, 311, 411, 511, 611, 711, or 811 are available in your community, you can still dial three digits.

For industry information and further details on area code relief planning, visit the North American Numbering Plan Administration (NANPA) website.

Calling toll free and 900 numbers

Toll-free numbers begin with one of the following three-digit area codes. Charges to these toll-free numbers are almost always paid by the party being called.
  • 800
  • 844
  • 855
  • 866
  • 877
  • 888
The charge for calling 900 numbers varies and is set by the service provider offering the product or service. Be aware of the cost to dial the 900 number before you call.

For more information on toll-free and 900 numbers and your rights, go to the Federal Trade Commission's website at www.consumer.ftc.gov.

Note: To the best of our knowledge, this information is factual and current. However, we accept no liability for losses or damages due to incorrect information or misuse of information.
Last updated: December 1, 2025

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