All assignees
800 prefixes in 503 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 503-400 | SALEM | 3234 | 2007-05-10 | Yes |
| 503-401 | PORTLAND | 9638 | — | — |
| 503-402 | PORTLAND | 9638 | — | — |
| 503-403 | BEAVERTON | 7229 | — | Yes |
| 503-404 | STFRD-SNDY | 7229 | — | Yes |
| 503-405 | GRESHAM | 7229 | — | Yes |
| 503-406 | CLACKAMAS | 3234 | — | Yes |
| 503-407 | PORTLAND | 5820 | — | — |
| 503-408 | PORTLAND | 9638 | — | — |
| 503-409 | SALEM | 6529 | — | — |
| 503-410 | ST HELENS | 5562 | — | Yes |
| 503-411 | XXXXXXXXXX | MULT | — | — |
| 503-412 | PORTLAND | 9638 | — | Yes |
| 503-413 | PORTLAND | 9638 | — | Yes |
| 503-414 | PORTLAND | 9638 | — | — |
| 503-415 | PORTLAND | 9638 | — | Yes |
| 503-416 | PORTLAND | 7537 | — | — |
| 503-417 | PORTLAND | 9638 | — | — |
| 503-418 | PORTLAND | 9638 | — | — |
| 503-419 | PORTLAND | 7229 | — | Yes |
| 503-420 | DALLAS | 6529 | — | Yes |
| 503-421 | PORTLAND | 6529 | — | Yes |
| 503-422 | PORTLAND | 6529 | — | Yes |
| 503-423 | PORTLAND | 9638 | — | Yes |
| 503-424 | BEAVERTON | 3234 | — | Yes |
| 503-425 | PORTLAND | 9638 | — | Yes |
| 503-426 | PORTLAND | 8294 | — | — |
| 503-427 | STFRD-SNDY | 3234 | — | Yes |
| 503-428 | SALEM | 6010 | — | Yes |
| 503-429 | VERNONIA | 4323 | — | — |
| 503-430 | BEAVERTON | 7531 | — | Yes |
| 503-431 | BEAVERTON | 4323 | — | Yes |
| 503-432 | PORTLAND | 7531 | — | Yes |
| 503-433 | NORTH PL | 7229 | — | Yes |
| 503-434 | MCMINNVL | 4323 | — | — |
| 503-435 | MCMINNVL | 4323 | — | Yes |
| 503-436 | CANNON BCH | 9638 | — | Yes |
| 503-437 | MCMINNVL | 5562 | — | Yes |
| 503-438 | ST HELENS | 7531 | — | Yes |
| 503-439 | BEAVERTON | 4323 | — | — |
| 503-440 | SEASIDE | 5820 | — | Yes |
| 503-441 | PORTLAND | 9638 | — | — |
| 503-442 | PORTLAND | 6529 | 2005-01-26 | Yes |
| 503-443 | BEAVERTON | 4323 | — | Yes |
| 503-444 | PORTLAND | 7172 | — | Yes |
| 503-445 | PORTLAND | 7172 | — | Yes |
| 503-446 | PORTLAND | 6010 | 2009-07-01 | Yes |
| 503-447 | NORTH PL | 7531 | — | Yes |
| 503-448 | AUMSVLTRNR | 8629 | — | — |
| 503-449 | PORTLAND | 6529 | — | Yes |
| 503-450 | PORTLAND | 9638 | — | — |
| 503-451 | CLACKAMAS | 7531 | — | Yes |
| 503-452 | PORTLAND | 9638 | — | — |
| 503-453 | PORTLAND | 4323 | — | Yes |
| 503-454 | STFRD-SNDY | 7531 | — | Yes |
| 503-455 | WESTPORT | 9638 | — | Yes |
| 503-456 | BEAVERTON | 7229 | — | — |
| 503-457 | TILLAMOOK | 5820 | — | Yes |
| 503-458 | KNAPPA | 2395 | — | — |
| 503-459 | PORTLAND | 7537 | 2002-04-25 | Yes |
| 503-460 | PORTLAND | 9638 | — | Yes |
| 503-461 | GRANDRONDE | 750E | 2018-11-09 | Yes |
| 503-462 | CLACKAMAS | 7531 | — | Yes |
| 503-463 | SALEM | 9638 | — | — |
| 503-464 | PORTLAND | 9638 | — | Yes |
| 503-465 | GRESHAM | 4323 | — | Yes |
| 503-466 | BEAVERTON | 4323 | — | — |
| 503-467 | PORTLAND | 7172 | — | Yes |
| 503-468 | ASTORIA | 3234 | 2002-02-07 | Yes |
| 503-469 | BEAVERTON | 4323 | — | — |
| 503-470 | SEASIDE | 6529 | 2001-12-03 | Yes |
| 503-471 | PORTLAND | 9638 | — | — |
| 503-472 | MCMINNVL | 4323 | — | — |
| 503-473 | PORTLAND | 7229 | — | Yes |
| 503-474 | MCMINNVL | 4323 | — | Yes |
| 503-475 | PORTLAND | 6010 | — | — |
| 503-476 | NEWBERG | 7172 | — | Yes |
| 503-477 | PORTLAND | 5820 | 2006-12-19 | Yes |
| 503-478 | PORTLAND | 9638 | — | — |
| 503-479 | CLACKAMAS | 7537 | — | Yes |
| 503-480 | SALEM | 7172 | — | Yes |
| 503-481 | PORTLAND | 6529 | — | — |
| 503-482 | STFRD-SNDY | 7537 | — | Yes |
| 503-483 | PACIFIC CY | 3234 | 2004-04-06 | Yes |
| 503-484 | PORTLAND | 7531 | — | Yes |
| 503-485 | SALEM | 7172 | — | — |
| 503-486 | STFRD-SNDY | 3234 | — | Yes |
| 503-487 | NEWBERG | 3234 | — | Yes |
| 503-488 | PORTLAND | 7537 | — | Yes |
| 503-489 | GRESHAM | 7172 | — | Yes |
| 503-490 | PORTLAND | 6529 | — | Yes |
| 503-491 | GRESHAM | 4323 | — | — |
| 503-492 | GRESHAM | 4323 | — | — |
| 503-493 | PORTLAND | 9638 | — | — |
| 503-494 | PORTLAND | 9638 | — | — |
| 503-495 | BEAVERTON | 7531 | — | — |
| 503-496 | CLACKAMAS | 7172 | — | Yes |
| 503-497 | PORTLAND | 9638 | — | — |
| 503-498 | STFRD-SNDY | 7531 | — | Yes |
| 503-499 | PORTLAND | 9638 | — | — |
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.