MCIMETRO ACCESS TRANSMISSION SERVICES LLC
29 prefixes in 503 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 503-205 | PORTLAND | 7229 | — | — |
| 503-207 | BEAVERTON | 7229 | — | Yes |
| 503-264 | BEAVERTON | 7229 | — | — |
| 503-290 | PORTLAND | 7229 | — | Yes |
| 503-303 | CLACKAMAS | 7229 | — | Yes |
| 503-305 | CLACKAMAS | 7229 | — | Yes |
| 503-389 | NORTH PL | 7229 | — | Yes |
| 503-403 | BEAVERTON | 7229 | — | Yes |
| 503-404 | STFRD-SNDY | 7229 | — | Yes |
| 503-405 | GRESHAM | 7229 | — | Yes |
| 503-419 | PORTLAND | 7229 | — | Yes |
| 503-433 | NORTH PL | 7229 | — | Yes |
| 503-456 | BEAVERTON | 7229 | — | — |
| 503-473 | PORTLAND | 7229 | — | Yes |
| 503-532 | BEAVERTON | 7229 | — | — |
| 503-575 | PORTLAND | 7229 | 2008-11-18 | Yes |
| 503-610 | SHERWOOD | 7229 | — | Yes |
| 503-613 | BEAVERTON | 7229 | — | — |
| 503-616 | BEAVERTON | 7229 | — | Yes |
| 503-696 | BEAVERTON | 7229 | — | — |
| 503-707 | BEAVERTON | 7229 | — | Yes |
| 503-712 | BEAVERTON | 7229 | — | — |
| 503-716 | BEAVERTON | 7229 | — | Yes |
| 503-745 | PORTLAND | 7229 | — | — |
| 503-820 | PORTLAND | 7229 | — | Yes |
| 503-821 | PORTLAND | 7229 | — | Yes |
| 503-878 | STFRD-SNDY | 7229 | — | Yes |
| 503-922 | PORTLAND | 7229 | 2005-05-18 | Yes |
| 503-937 | PORTLAND | 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.