District of Columbia Area Codes
2 area codes in District of Columbia, United States. Country code: +1. Find area codes by city and region.
All District of Columbia Area Codes
| Area Code | Major Cities | Region |
|---|---|---|
| 202 | Washington DC | DC |
| 771 | Washington, D.C. (overlay for 202) | DC |
About District of Columbia Area Codes
District of Columbia uses 2 area codes under the North American Numbering Plan (NANP), serving Washington, Washington DC. Each code follows the 3-digit format and covers a defined geographic region within the state.
Overlay Codes in District of Columbia
District of Columbia has adopted 1 overlay code(s): 771. An overlay assigns a new area code to the same geographic region as an existing code, so both codes serve the same area. When overlay codes are active, callers must dial all 10 digits (area code + number) even for local calls within the same region.
Major Cities and Their Area Codes
Find which area code serves each major city in District of Columbia.
| City / Community | Area Code(s) |
|---|---|
| Washington | 771 |
| Washington DC | 202 |
How to Call District of Columbia
Within the US: dial 1 + area code + 7-digit number (10-digit dialing applies where overlays are active).
From Canada or the Caribbean: the same NANP format applies — 1 + area code + number.
From abroad: dial your country's exit code (011 from the US, 00 from most countries, or + on mobile), then 1, then the District of Columbia area code and number.
Example (from the UK): 00 1 202 XXX XXXX
Data source: North American Numbering Plan Administration (NANPA), ITU-T E.164. Area code assignments change with new overlays — verify with your carrier before dialing. NANPA