All assignees
708 prefixes in 657 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 657-500 | FULLERTON | 649C | — | Yes |
| 657-501 | HUNTITNBCH | 6006 | 2021-06-10 | Yes |
| 657-502 | HUNTITNBCH | 6529 | 2021-06-09 | Yes |
| 657-503 | ANAHEIM | 6006 | 2021-06-17 | Yes |
| 657-504 | HUNTITNBCH | 6006 | 2021-06-17 | Yes |
| 657-505 | ANAHEIM | 6529 | 2021-05-19 | Yes |
| 657-506 | SANTA ANA | 6006 | 2021-06-17 | Yes |
| 657-507 | SILVERADO | 6006 | 2021-06-17 | Yes |
| 657-508 | CYPRESS | 6529 | 2021-06-30 | Yes |
| 657-509 | SANTA ANA | 6010 | 2021-07-01 | Yes |
| 657-510 | ANAHEIM | 6006 | 2021-07-07 | Yes |
| 657-511 | MULT | — | — | |
| 657-512 | HUNTITNBCH | 6006 | 2021-07-07 | Yes |
| 657-513 | ANAHEIM | 6006 | 2021-07-19 | Yes |
| 657-514 | BUENA PARK | 981E | 2021-07-29 | Yes |
| 657-515 | HUNTITNBCH | 6006 | 2021-07-28 | Yes |
| 657-516 | ANAHEIM | 6006 | 2021-10-26 | Yes |
| 657-517 | HUNTITNBCH | 6006 | 2021-08-05 | Yes |
| 657-518 | ANAHEIM | 6006 | 2021-11-22 | Yes |
| 657-519 | SILVERADO | 6006 | 2022-01-17 | Yes |
| 657-520 | SANTA ANA | 6010 | 2021-09-02 | Yes |
| 657-521 | ANAHEIM | 6006 | 2021-06-10 | Yes |
| 657-522 | YORBALINDA | 981E | 2018-03-13 | Yes |
| 657-523 | GARDEN GRV | 6529 | 2021-09-27 | Yes |
| 657-524 | WESTMINSTR | 6006 | 2021-10-26 | Yes |
| 657-525 | FULLERTON | 939H | 2021-09-24 | Yes |
| 657-526 | ANAHEIM | 7139 | 2021-10-06 | Yes |
| 657-527 | ANAHEIM | 6529 | 2021-08-23 | Yes |
| 657-528 | WESTMINSTR | 6006 | 2021-06-16 | Yes |
| 657-529 | BUENA PARK | 981E | — | Yes |
| 657-530 | BREA | 6010 | 2021-10-26 | Yes |
| 657-531 | HUNTITNBCH | 6010 | 2021-10-13 | Yes |
| 657-532 | SANTA ANA | 6010 | 2021-11-04 | Yes |
| 657-533 | ANAHEIM | 965H | 2021-07-07 | Yes |
| 657-534 | ORANGE | 6529 | 2021-11-17 | Yes |
| 657-535 | YORBALINDA | 981E | 2021-08-23 | Yes |
| 657-536 | ANAHEIM | 6006 | 2022-01-07 | Yes |
| 657-537 | SILVERADO | 6529 | 2021-12-10 | Yes |
| 657-538 | SILVERADO | 6006 | 2021-03-29 | Yes |
| 657-539 | ANAHEIM | 6006 | 2021-11-10 | Yes |
| 657-540 | HUNTITNBCH | 6529 | 2022-01-10 | Yes |
| 657-541 | HUNTITNBCH | 6006 | 2021-11-15 | Yes |
| 657-542 | HUNTITNBCH | 6006 | 2022-01-07 | Yes |
| 657-543 | SANTA ANA | 6529 | 2022-01-10 | Yes |
| 657-544 | SILVERADO | 965H | 2021-07-07 | Yes |
| 657-545 | SANTA ANA | 6006 | 2022-01-07 | Yes |
| 657-546 | ANAHEIM | 6006 | 2022-01-10 | Yes |
| 657-547 | HUNTITNBCH | 6006 | 2022-01-11 | Yes |
| 657-548 | WESTMINSTR | 6006 | 2022-01-07 | Yes |
| 657-549 | ANAHEIM | 981E | 2010-02-23 | Yes |
| 657-550 | ANAHEIM | 6006 | 2022-01-13 | Yes |
| 657-551 | WESTMINSTR | 6529 | 2021-11-09 | Yes |
| 657-552 | WESTMINSTR | 6006 | 2021-08-05 | Yes |
| 657-553 | SANTA ANA | 649C | 2021-11-04 | Yes |
| 657-554 | FULLERTON | 6006 | 2022-01-13 | Yes |
| 657-555 | MULT | — | — | |
| 657-556 | CYPRESS | 6529 | 2021-11-18 | Yes |
| 657-557 | SANTA ANA | 6006 | 2022-01-17 | Yes |
| 657-558 | ANAHEIM | 6006 | 2021-08-05 | Yes |
| 657-559 | WESTMINSTR | 6006 | 2022-01-17 | Yes |
| 657-560 | ANAHEIM | 6006 | 2022-02-10 | Yes |
| 657-561 | ORANGE | 6006 | 2022-01-25 | Yes |
| 657-562 | ORANGE | 6010 | 2022-01-27 | Yes |
| 657-563 | HUNTITNBCH | 6006 | 2022-01-27 | Yes |
| 657-564 | HUNTITNBCH | 6006 | 2022-02-24 | Yes |
| 657-565 | SANTA ANA | 7229 | 2022-02-02 | Yes |
| 657-566 | FULLERTON | 965H | 2021-01-27 | Yes |
| 657-567 | SANTA ANA | 649C | 2020-03-27 | Yes |
| 657-568 | HUNTITNBCH | 6006 | 2022-02-10 | Yes |
| 657-569 | HUNTITNBCH | 6006 | 2022-02-10 | Yes |
| 657-570 | ANAHEIM | 6006 | 2022-02-24 | Yes |
| 657-571 | YORBALINDA | 981E | 2022-03-11 | Yes |
| 657-572 | HUNTITNBCH | 6006 | 2022-03-07 | Yes |
| 657-573 | CYPRESS | 6006 | 2022-04-12 | Yes |
| 657-574 | ANAHEIM | 6006 | 2022-04-12 | Yes |
| 657-575 | ANAHEIM | 6006 | 2022-03-15 | Yes |
| 657-576 | ANAHEIM | 6006 | 2022-05-20 | Yes |
| 657-577 | FULLERTON | 965H | 2020-06-01 | Yes |
| 657-578 | ANAHEIM | 6006 | 2022-03-07 | Yes |
| 657-579 | ORANGE | 7139 | 2022-05-10 | Yes |
| 657-580 | ANAHEIM | 6006 | 2022-03-28 | Yes |
| 657-581 | ORANGE | 6006 | 2022-04-25 | Yes |
| 657-582 | ANAHEIM | 649C | 2022-02-24 | Yes |
| 657-583 | GARDEN GRV | 6006 | 2022-05-06 | Yes |
| 657-584 | ANAHEIM | 6006 | 2022-04-28 | Yes |
| 657-585 | SANTA ANA | 6529 | 2022-04-25 | Yes |
| 657-586 | HUNTITNBCH | 6006 | 2022-03-02 | Yes |
| 657-587 | SILVERADO | 965H | 2021-06-17 | Yes |
| 657-588 | BREA | 965H | 2020-06-01 | Yes |
| 657-589 | HUNTITNBCH | 6006 | 2022-05-13 | Yes |
| 657-590 | SILVERADO | 6006 | 2022-05-27 | Yes |
| 657-591 | HUNTITNBCH | 6006 | 2022-05-20 | Yes |
| 657-592 | ANAHEIM | 6006 | 2022-03-02 | Yes |
| 657-593 | WESTMINSTR | 6006 | 2022-05-27 | Yes |
| 657-594 | ANAHEIM | 829J | 2022-06-17 | Yes |
| 657-595 | ANAHEIM | 6006 | 2022-05-27 | Yes |
| 657-596 | HUNTITNBCH | 6006 | 2022-05-27 | Yes |
| 657-597 | ANAHEIM | 6006 | 2022-06-21 | Yes |
| 657-598 | ANAHEIM | 6006 | 2022-06-07 | Yes |
| 657-599 | WESTMINSTR | 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.