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District of Columbia Area Codes
District of Columbia has 2 area codes in service: 202 and 771.
Largest cities
| City | Area codes |
|---|---|
| Washington | 202, 771 |
All area codes in District of Columbia
| Code | Main cities | Overlay | In service since | Projected exhaust |
|---|---|---|---|---|
| 202 | Washington | 771 | 1947 | 2088 |
| 771 | Washington | 202 | 2021 | 2088 |
857 prefixes are in use across District of Columbia. Exhaust years are NANPA's 2026 forecast.