771 Area Code

Area Code 771 Location: Washington, D.C.

Phone numbers with this area code prefix originate from the District of Columbia.

Major Cities in the 771 Service Area:

• Washington, D.C.

Overlay System

Area code 771 operates as an overlay for Washington, D.C., sharing the same geographic region with area code 202. Area code 202 was one of the original North American area codes established in October 1947. Area code 771 was added to the numbering plan area in April 2021 in creation of an overlay complex to mitigate impending telephone number shortages. The installation of a second area code required a transition to ten-digit dialing for all calls within the District. The overlay implementation commenced with a permissive dialing period from April 10, 2021, to October 9, 2021, during which ten-digit dialing of 202-telephone numbers was optional. The first central office code assignments for 771 took place on November 8, 2021.

Area Code 771 Location Map

Area code 771 is a general purpose code which was placed in service on November 9, 2021.

771 Area Code Prefixes

Our Washington, D.C. phone number lookup service will analyze the three-digit prefix of any 771 area code phone number and will show which telecommunications company and rate center it was initially assigned to. This prefix code data may help to determine the U.S. carrier, Washington, D.C. geographic region, and local calling area associated with the phone number.

Phone numbers follow the following structure under the North American Numbering Plan:

• NPA- area code (where the number was originally assigned)
• NXX - Central office code that locates the specific neighborhood and identifies the service provider
• XXXX - Subscriber number identifies the individual phone line within that local exchange

Understanding the area code can help you determine if a call is local to your area. However, keep in mind that due to mobile number portability and VoIP services, the caller may be anywhere in the United States, so it’s best to search for the most recent phone number details.

Prefixes by Company

Company	Number of Prefixes

Carrier names have been updated from their original FCC assignments to reflect current companies following mergers, acquisitions, and rebranding. Updates were determined using AI-assisted research and may not be accurate or reflect up to date changes. This data is provided without warranties of accuracy or completeness.

Prefixes by Rate Center

Rate Center	Number of Prefixes

Other Washington, D.C. Area Codes

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