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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.

INSTRUCTIONS & INFO

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 (PDF, 124KB)

Arizona

480/520/928 (PDF, 124KB)

Arkansas

501 (PDF, 266KB)

California

Colorado

719/970 (PDF, 124KB)

Delaware

302 (PDF, 124KB)

Florida

Georgia

Hawaii

808 (PDF, 124KB)

Idaho

208/986 (PDF, 49KB)

Illinois

Indiana

Iowa

319/515 (PDF, 124KB)

Kansas

620/785 (PDF, 266KB)

Kentucky

Louisiana

337/504 (PDF, 266KB)

Michigan

Minnesota

218/952 (PDF, 124KB)

Mississippi

Missouri

314/417/660/816 (PDF, 266KB)

Montana

406 (PDF, 124KB)

Nevada

New Hampshire

603 (PDF, 124KB)

New Jersey

New Mexico

505/575 (PDF, 124KB)

New York

North Carolina

Ohio

Oklahoma

Pennsylvania

South Carolina

South Dakota

605 (PDF, 124KB)

Tennessee

Texas

Vermont

802 (PDF, 124KB)

Virginia

276/804 (PDF, 124KB)

Washington, DC

202/771 (PDF, 54KB)

Washington

Wisconsin


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: May 1, 2021

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