Overlays

An area code overlay is the addition of another area code to the same geographic region served by an existing area code. An overlay does not require customers to change their existing area code but does require customers to use a new dialing procedure to complete telephone calls. When an overlay is implemented, customers must dial “1” followed by the area code and the seven-digit telephone number to complete every call, including calls within the same area code.

Overlays occur throughout the country when needed. Please click on the links below to learn more about recent overlays in the following areas:

New 357 Area Code Coming to California 559 Area Code Region

Learn more about changes coming to the California 559 Area Code Region. Learn more about The New Area Code 357. Please see this brochure or refer to the 599/357 informative website from the California Public Utilities Commission.

New 686 Area Code Coming to Virginia 804 Area Code Region

Learn more about changes coming to the Virginia 804 Area Code Region. Click HERE for details about dialing plan changes coming to 686 and 804 area codes.

10-Digit Dialing Coming to Cincinnati Area

Learn more about changes coming to the Cincinnati, Ohio area. Click HERE for details about dialing plan changes coming to 513 and 283 area codes.
 

10-Digit Dialing Coming to Phoenix Area

Learn more about changes coming to the Phoenix, Arizona area. Click HERE for details about dialing plan changes coming to 480, 602, and 623 area codes.