T-MOBILE USA, INC.
56 prefixes in 503 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 503-209 | PORTLAND | 6529 | — | Yes |
| 503-267 | PORTLAND | 6529 | — | — |
| 503-269 | SALEM | 6529 | — | Yes |
| 503-309 | PORTLAND | 6529 | — | Yes |
| 503-317 | PORTLAND | 6529 | — | — |
| 503-334 | PORTLAND | 6529 | — | Yes |
| 503-358 | PORTLAND | 6529 | — | Yes |
| 503-380 | PORTLAND | 6529 | — | — |
| 503-381 | PORTLAND | 6529 | — | Yes |
| 503-409 | SALEM | 6529 | — | — |
| 503-420 | DALLAS | 6529 | — | Yes |
| 503-421 | PORTLAND | 6529 | — | Yes |
| 503-422 | PORTLAND | 6529 | — | Yes |
| 503-442 | PORTLAND | 6529 | 2005-01-26 | Yes |
| 503-449 | PORTLAND | 6529 | — | Yes |
| 503-470 | SEASIDE | 6529 | 2001-12-03 | Yes |
| 503-481 | PORTLAND | 6529 | — | — |
| 503-490 | PORTLAND | 6529 | — | Yes |
| 503-515 | PORTLAND | 6529 | — | — |
| 503-516 | PORTLAND | 6529 | — | — |
| 503-519 | PORTLAND | 6529 | — | Yes |
| 503-544 | PORTLAND | 6529 | — | — |
| 503-560 | MCMINNVL | 6529 | — | Yes |
| 503-569 | SALEM | 6529 | — | Yes |
| 503-572 | PORTLAND | 6529 | — | Yes |
| 503-602 | SALEM | 6529 | — | Yes |
| 503-664 | BEAVER | 6529 | 2004-09-17 | Yes |
| 503-740 | PORTLAND | 6529 | — | — |
| 503-741 | ASTORIA | 6529 | — | Yes |
| 503-750 | PORTLAND | 6529 | — | — |
| 503-752 | PORTLAND | 6529 | — | Yes |
| 503-753 | PORTLAND | 6529 | — | Yes |
| 503-754 | PORTLAND | 6529 | — | Yes |
| 503-756 | PORTLAND | 6529 | — | Yes |
| 503-757 | PORTLAND | 6529 | — | Yes |
| 503-793 | PORTLAND | 6529 | — | Yes |
| 503-809 | NORTH PL | 6529 | — | Yes |
| 503-810 | PORTLAND | 6529 | — | — |
| 503-841 | PORTLAND | 6529 | 2005-10-21 | Yes |
| 503-849 | PORTLAND | 6529 | — | Yes |
| 503-851 | SALEM | 6529 | — | — |
| 503-884 | SALEM | 6529 | — | Yes |
| 503-888 | PORTLAND | 6529 | — | — |
| 503-890 | PORTLAND | 6529 | — | Yes |
| 503-891 | PORTLAND | 6529 | — | Yes |
| 503-901 | PORTLAND | 6529 | — | Yes |
| 503-914 | PORTLAND | 6529 | — | Yes |
| 503-917 | DALLAS | 6529 | — | Yes |
| 503-927 | PORTLAND | 6529 | 2006-01-12 | Yes |
| 503-932 | SALEM | 6529 | — | Yes |
| 503-957 | PORTLAND | 6529 | — | Yes |
| 503-975 | PORTLAND | 6529 | — | Yes |
| 503-984 | WOODBURN | 6529 | — | Yes |
| 503-997 | PORTLAND | 6529 | — | — |
| 503-998 | PORTLAND | 6529 | — | — |
| 503-999 | SALEM | 6529 | — | — |
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.