DULLES — VA
Data last updated: June 25, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| VERIZON SOUTH, INC. - VA (CONTEL) | 0233 | 2 |
| PEERLESS NETWORK OF VIRGINIA, LLC - VA | 275G | 2 |
| METROPCS, INC. | 5562 | 2 |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | 2 |
| TELEPORT COMMUNICATIONS AMERICA, LLC - DC | 7529 | 2 |