District of Columbia phone numbers and area codes
District of Columbia has 2 area codes and 855 assigned prefixes.
Look at a prefix's carrier mix below, or look up a full number on the home page.
- Mobile carrier 30%
- Local phone company 38%
- Internet / business phone carrier 27%
- Paging service 2%
- Phone company 3%
Area codes in District of Columbia
Biggest local calling areas
Numbers are assigned to rate centers. These have the most prefixes in District of Columbia (the number is how many).
Carriers in District of Columbia
| Carrier | Type | Prefixes | Share |
|---|---|---|---|
| Verizon (local phone) | Local phone company | 327 | 38% |
| Verizon Wireless | Mobile carrier | 92 | 11% |
| T-Mobile (including Sprint) | Mobile carrier | 59 | 7% |
| AT&T Mobility | Mobile carrier | 58 | 7% |
| Onvoy | Internet / business phone carrier | 52 | 6% |
| MetroPCS (T-Mobile) | Mobile carrier | 44 | 5% |
| MCImetro (Verizon Business) | Internet / business phone carrier | 43 | 5% |
| Bandwidth | Internet / business phone carrier | 36 | 4% |
| Level 3 (Lumen) | Internet / business phone carrier | 31 | 4% |
| Teleport Communications America | Internet / business phone carrier | 25 | 3% |
| Windstream (PAETEC) | Internet / business phone carrier | 19 | 2% |
| Spok | Paging service | 14 | 2% |
Most prefixes are pooled: the 10,000 numbers in each are handed out in blocks of 1,000 to different carriers, and people can also take their numbers to another carrier. So the carrier shown is where the prefix started, not a guarantee about any one number. Source: NANPA central office code records, 2026-10-10.