Washington DC Area Code Information
(202 and 771)
Washington, DC is currently using two area codes. Washington, DC utilizes one area code overlay. Area codes 202 and 771 cover all of the District of Columbia.
Changes and History of Washington, DC Area Codes:
Area code 202 was put into service.
Area code 771 was put into service as an all services overlay of area code 202. Ten digit dialing (area code + seven digit number) is necessary in the 202/771 overlay effective October 9, 2021 because different homes in the same geographic area can have the same seven digit phone number but each would have a different area code.