All assignees
708 prefixes in 657 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 657-400 | WESTMINSTR | 649C | — | Yes |
| 657-401 | SANTA ANA | 6006 | 2019-02-13 | Yes |
| 657-402 | WESTMINSTR | 6006 | 2019-05-21 | Yes |
| 657-403 | HUNTITNBCH | 6006 | 2019-10-23 | Yes |
| 657-404 | HUNTITNBCH | 6006 | 2019-10-30 | Yes |
| 657-405 | SANTA ANA | 6006 | 2019-10-30 | Yes |
| 657-406 | SILVERADO | 6006 | 2019-10-30 | Yes |
| 657-407 | WESTMINSTR | 6006 | 2019-10-30 | Yes |
| 657-408 | HUNTITNBCH | 6010 | 2019-12-17 | Yes |
| 657-409 | SILVERADO | 6006 | 2019-11-08 | Yes |
| 657-410 | SILVERADO | 6006 | 2019-03-14 | Yes |
| 657-411 | MULT | — | — | |
| 657-412 | HUNTITNBCH | 6006 | 2019-11-18 | Yes |
| 657-413 | CYPRESS | 7229 | 2019-12-02 | Yes |
| 657-414 | HUNTITNBCH | 6006 | 2019-12-19 | Yes |
| 657-415 | SILVERADO | 6006 | 2020-02-10 | Yes |
| 657-416 | HUNTITNBCH | 6006 | 2019-11-08 | Yes |
| 657-417 | HUNTITNBCH | 6006 | 2020-01-16 | Yes |
| 657-418 | SANTA ANA | 6010 | 2020-01-28 | Yes |
| 657-419 | SANTA ANA | 6006 | 2019-04-22 | Yes |
| 657-420 | WESTMINSTR | 6006 | 2020-02-10 | Yes |
| 657-421 | HUNTITNBCH | 6006 | 2020-01-27 | Yes |
| 657-422 | SANTA ANA | 899D | 2020-02-13 | Yes |
| 657-423 | SILVERADO | 6006 | 2020-02-28 | Yes |
| 657-424 | HUNTITNBCH | 6006 | 2020-03-10 | Yes |
| 657-425 | WESTMINSTR | 6010 | 2020-03-13 | Yes |
| 657-426 | HUNTITNBCH | 6006 | 2020-03-18 | Yes |
| 657-427 | GARDEN GRV | 6010 | 2020-03-19 | Yes |
| 657-428 | ORANGE | 6010 | 2020-03-30 | Yes |
| 657-429 | HUNTITNBCH | 6006 | 2020-04-02 | Yes |
| 657-430 | SANTA ANA | 6006 | 2019-11-08 | Yes |
| 657-431 | WESTMINSTR | 6529 | 2019-03-20 | Yes |
| 657-432 | SILVERADO | 6006 | 2020-04-03 | Yes |
| 657-433 | HUNTITNBCH | 6006 | 2020-02-10 | Yes |
| 657-434 | HUNTITNBCH | 6006 | 2020-04-13 | Yes |
| 657-435 | WESTMINSTR | 6006 | 2020-04-20 | Yes |
| 657-436 | SANTA ANA | 6010 | 2020-04-20 | Yes |
| 657-437 | HUNTITNBCH | 6006 | 2020-05-11 | Yes |
| 657-438 | ORANGE | 996H | 2020-06-02 | Yes |
| 657-439 | ANAHEIM | 373F | — | Yes |
| 657-440 | ANAHEIM | 6010 | 2020-06-11 | Yes |
| 657-441 | WESTMINSTR | 6006 | — | Yes |
| 657-442 | HUNTITNBCH | 6006 | 2020-07-23 | Yes |
| 657-443 | WESTMINSTR | 197D | 2020-06-12 | Yes |
| 657-444 | PLACENTIA | 981E | — | Yes |
| 657-445 | FULLERTON | 6529 | 2015-10-19 | Yes |
| 657-446 | SANTA ANA | 6010 | 2020-06-30 | Yes |
| 657-447 | WESTMINSTR | 6006 | 2020-07-28 | Yes |
| 657-448 | HUNTITNBCH | 6006 | 2020-07-30 | Yes |
| 657-449 | SILVERADO | 6006 | 2020-08-05 | Yes |
| 657-450 | SANTA ANA | 6006 | 2020-02-28 | Yes |
| 657-451 | HUNTITNBCH | 6006 | 2020-08-11 | Yes |
| 657-452 | BUENA PARK | 981E | 2020-08-21 | Yes |
| 657-453 | ANAHEIM | 6006 | 2020-09-01 | Yes |
| 657-454 | ANAHEIM | 6006 | 2020-09-17 | Yes |
| 657-455 | SANTA ANA | 6006 | 2020-09-25 | Yes |
| 657-456 | ANAHEIM | 6529 | — | Yes |
| 657-457 | HUNTITNBCH | 6006 | 2020-09-28 | Yes |
| 657-458 | WESTMINSTR | 6006 | 2020-10-01 | Yes |
| 657-459 | ANAHEIM | 6006 | 2020-10-08 | Yes |
| 657-460 | SANTA ANA | 6006 | 2020-07-30 | Yes |
| 657-461 | SILVERADO | 6006 | 2020-10-08 | Yes |
| 657-462 | SILVERADO | 6006 | 2020-11-06 | Yes |
| 657-463 | WESTMINSTR | 6006 | 2020-12-14 | Yes |
| 657-464 | HUNTITNBCH | 981E | — | Yes |
| 657-465 | CYPRESS | 6010 | — | Yes |
| 657-466 | HUNTITNBCH | 6006 | 2020-11-06 | Yes |
| 657-467 | SANTA ANA | 649C | 2020-12-15 | Yes |
| 657-468 | SANTA ANA | 6010 | 2020-12-16 | Yes |
| 657-469 | ANAHEIM | 6006 | 2020-12-17 | Yes |
| 657-470 | HUNTITNBCH | 6006 | 2020-10-08 | Yes |
| 657-471 | WESTMINSTR | 6006 | 2020-02-28 | Yes |
| 657-472 | SANTA ANA | 6006 | 2020-11-06 | Yes |
| 657-473 | HUNTITNBCH | 6006 | 2020-12-17 | Yes |
| 657-474 | ANAHEIM | 6010 | 2020-12-23 | Yes |
| 657-475 | HUNTITNBCH | 6006 | 2020-12-28 | Yes |
| 657-476 | HUNTITNBCH | 6006 | 2021-01-18 | Yes |
| 657-477 | SILVERADO | 6006 | 2020-12-28 | Yes |
| 657-478 | BREA | 6010 | 2017-06-26 | Yes |
| 657-479 | ANAHEIM | 6006 | 2021-01-18 | Yes |
| 657-480 | ANAHEIM | 6010 | 2020-12-23 | Yes |
| 657-481 | HUNTITNBCH | 6006 | 2020-12-28 | Yes |
| 657-482 | ANAHEIM | 6006 | 2021-01-28 | Yes |
| 657-483 | HUNTITNBCH | 6006 | 2021-01-28 | Yes |
| 657-484 | SANTA ANA | 6006 | 2021-01-28 | Yes |
| 657-485 | HUNTITNBCH | 073H | 2021-01-29 | Yes |
| 657-486 | SILVERADO | 073H | 2021-02-01 | Yes |
| 657-487 | SANTA ANA | 8826 | 2021-02-04 | Yes |
| 657-488 | SANTA ANA | 6006 | 2020-05-11 | Yes |
| 657-489 | ANAHEIM | 6006 | 2021-02-09 | Yes |
| 657-490 | HUNTITNBCH | 6006 | 2021-02-09 | Yes |
| 657-491 | WESTMINSTR | 6006 | 2021-02-17 | Yes |
| 657-492 | ANAHEIM | 6006 | 2021-03-09 | Yes |
| 657-493 | HUNTITNBCH | 6006 | 2021-03-09 | Yes |
| 657-494 | ANAHEIM | 6006 | 2021-03-26 | Yes |
| 657-495 | ANAHEIM | 6006 | 2021-03-22 | Yes |
| 657-496 | HUNTITNBCH | 6006 | 2021-05-27 | Yes |
| 657-497 | ANAHEIM | 6006 | 2021-04-15 | Yes |
| 657-498 | HUNTITNBCH | 6006 | 2021-04-15 | Yes |
| 657-499 | ORANGE | 965H | 2021-03-05 | Yes |
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.