MCIMETRO ACCESS TRANSMISSION SERVICES LLC
31 prefixes in 303 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 303-209 | DENVER | 7229 | — | — |
| 303-214 | DENVER | 7229 | — | Yes |
| 303-217 | DENVER | 7229 | — | Yes |
| 303-218 | DENVER | 7229 | — | Yes |
| 303-219 | DENVER | 7229 | — | Yes |
| 303-222 | DENVER | 7229 | — | — |
| 303-242 | DENVER | 7229 | — | Yes |
| 303-302 | DENVER | 7229 | — | — |
| 303-305 | DENVER | 7229 | — | Yes |
| 303-323 | DENVER | 7229 | — | Yes |
| 303-328 | DENVER | 7229 | — | Yes |
| 303-334 | DENVER | 7229 | — | — |
| 303-357 | DENVER | 7229 | — | Yes |
| 303-390 | DENVER | 7229 | — | — |
| 303-476 | DENVER | 7229 | — | Yes |
| 303-481 | DENVER | 7229 | — | Yes |
| 303-495 | DENVER | 7229 | — | Yes |
| 303-496 | DENVER | 7229 | 2004-04-08 | Yes |
| 303-531 | DENVER | 7229 | — | Yes |
| 303-539 | DENVER | 7229 | — | — |
| 303-542 | DENVER | 7229 | — | — |
| 303-551 | DENVER | 7229 | — | Yes |
| 303-566 | DENVER | 7229 | — | Yes |
| 303-704 | DENVER | 7229 | — | Yes |
| 303-729 | DENVER | 7229 | — | — |
| 303-785 | DENVER | 7229 | — | — |
| 303-801 | DENVER | 7229 | — | Yes |
| 303-876 | DENVER | 7229 | — | — |
| 303-928 | DENVER | 7229 | — | Yes |
| 303-968 | DENVER | 7229 | — | Yes |
| 303-991 | DENVER | 7229 | — | — |
These are initial assignees from NANPA CO-code records — because of number portability, the current serving carrier of individual numbers may differ. Bulk export requires a membership.