All assignees
708 prefixes in 657 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 657-600 | SANTA ANA | 649C | — | Yes |
| 657-601 | SANTA ANA | 6006 | 2022-06-07 | Yes |
| 657-602 | ANAHEIM | 026K | 2022-06-08 | Yes |
| 657-603 | CYPRESS | 6006 | 2022-06-07 | Yes |
| 657-604 | ORANGE | 6006 | 2022-06-23 | Yes |
| 657-605 | ORANGE | 671J | 2022-06-29 | Yes |
| 657-606 | GARDEN GRV | 6006 | — | Yes |
| 657-607 | ANAHEIM | 6006 | 2022-07-18 | Yes |
| 657-608 | ORANGE | 6529 | 2022-07-14 | Yes |
| 657-609 | HUNTITNBCH | 6006 | 2022-07-21 | Yes |
| 657-610 | SANTA ANA | 026K | 2022-06-09 | Yes |
| 657-611 | MULT | — | — | |
| 657-612 | GARDEN GRV | 6529 | 2022-07-22 | Yes |
| 657-613 | CYPRESS | 981E | 2022-07-26 | Yes |
| 657-614 | ANAHEIM | 6006 | 2022-08-10 | Yes |
| 657-615 | ANAHEIM | 6529 | 2022-08-12 | Yes |
| 657-616 | HUNTITNBCH | 373F | 2022-08-19 | Yes |
| 657-617 | ANAHEIM | 6006 | 2022-10-21 | Yes |
| 657-618 | SANTA ANA | 6529 | 2022-09-20 | Yes |
| 657-619 | ORANGE | 7139 | 2022-10-04 | Yes |
| 657-620 | CYPRESS | 981E | 2022-10-27 | Yes |
| 657-621 | WESTMINSTR | 6006 | 2022-10-12 | Yes |
| 657-622 | SANTA ANA | 9740 | 2009-05-18 | Yes |
| 657-623 | ANAHEIM | 6529 | 2022-10-11 | Yes |
| 657-624 | ANAHEIM | 6006 | 2022-10-27 | Yes |
| 657-625 | CYPRESS | 6529 | 2022-09-20 | Yes |
| 657-626 | PLACENTIA | 516J | 2022-01-14 | Yes |
| 657-627 | SILVERADO | 6006 | 2022-10-21 | Yes |
| 657-628 | HUNTITNBCH | 6006 | 2022-10-21 | Yes |
| 657-629 | WESTMINSTR | 981E | 2022-10-27 | Yes |
| 657-630 | HUNTITNBCH | 6006 | 2022-10-27 | Yes |
| 657-631 | FULLERTON | 981E | 2022-09-20 | Yes |
| 657-632 | FULLERTON | 981E | 2022-10-28 | Yes |
| 657-633 | HUNTITNBCH | 965H | 2021-07-07 | Yes |
| 657-634 | ANAHEIM | 6006 | 2022-11-04 | Yes |
| 657-635 | SANTA ANA | 6006 | 2022-10-27 | Yes |
| 657-636 | GARDEN GRV | 6006 | 2022-11-09 | Yes |
| 657-637 | ANAHEIM | 6006 | 2022-11-07 | Yes |
| 657-638 | HUNTITNBCH | 6006 | 2022-11-07 | Yes |
| 657-639 | HUNTITNBCH | 6006 | 2022-01-13 | Yes |
| 657-640 | ANAHEIM | 6006 | 2022-11-15 | Yes |
| 657-641 | SANTA ANA | 6006 | 2022-11-08 | Yes |
| 657-642 | HUNTITNBCH | 6006 | 2022-11-15 | Yes |
| 657-643 | SANTA ANA | 6010 | 2022-11-16 | Yes |
| 657-644 | CYPRESS | 965H | 2020-09-21 | Yes |
| 657-645 | SANTA ANA | 732J | — | Yes |
| 657-646 | HUNTITNBCH | 6006 | 2023-01-04 | Yes |
| 657-647 | ORANGE | 6010 | 2022-12-16 | Yes |
| 657-648 | SANTA ANA | 6006 | 2023-01-04 | Yes |
| 657-649 | SILVERADO | 6006 | 2023-01-04 | Yes |
| 657-650 | ORANGE | 6006 | 2020-09-23 | Yes |
| 657-651 | ANAHEIM | 6006 | 2023-01-04 | Yes |
| 657-652 | ANAHEIM | 516J | 2022-01-19 | Yes |
| 657-653 | ANAHEIM | 6006 | 2023-01-11 | Yes |
| 657-654 | ANAHEIM | 6006 | 2023-01-18 | Yes |
| 657-655 | SANTA ANA | 965H | 2020-06-01 | Yes |
| 657-656 | ANAHEIM | 649C | 2020-12-10 | Yes |
| 657-657 | ANAHEIM | 649C | 2019-03-07 | Yes |
| 657-658 | ANAHEIM | 6006 | 2023-01-30 | Yes |
| 657-659 | ANAHEIM | 6006 | 2023-02-02 | Yes |
| 657-660 | SANTA ANA | 7139 | 2019-04-18 | Yes |
| 657-661 | HUNTITNBCH | 6006 | 2023-02-02 | Yes |
| 657-662 | SANTA ANA | 6006 | 2023-02-02 | Yes |
| 657-663 | BUENA PARK | 649C | 2023-09-19 | Yes |
| 657-664 | SILVERADO | 6006 | 2023-02-02 | Yes |
| 657-665 | ANAHEIM | 6006 | 2023-02-10 | Yes |
| 657-666 | WESTMINSTR | 649C | — | Yes |
| 657-667 | GARDEN GRV | 793K | 2013-03-15 | Yes |
| 657-668 | ANAHEIM | 6006 | 2023-02-10 | Yes |
| 657-669 | ORANGE | 6010 | 2023-03-24 | Yes |
| 657-670 | WESTMINSTR | 649C | 2023-04-07 | Yes |
| 657-671 | BREA | 939H | 2023-08-10 | Yes |
| 657-672 | ANAHEIM | 6006 | 2023-07-25 | Yes |
| 657-673 | HUNTITNBCH | 6006 | 2023-07-25 | Yes |
| 657-674 | ORANGE | 6010 | 2023-07-25 | Yes |
| 657-675 | ANAHEIM | 6006 | 2023-08-08 | Yes |
| 657-676 | SANTA ANA | 6529 | 2023-08-10 | Yes |
| 657-677 | ORANGE | 965H | 2020-06-01 | Yes |
| 657-678 | ANAHEIM | 6529 | 2023-08-10 | Yes |
| 657-679 | GARDEN GRV | 6529 | 2023-08-10 | Yes |
| 657-680 | SANTA ANA | 649C | 2023-08-11 | Yes |
| 657-681 | FULLERTON | 6529 | 2023-08-23 | Yes |
| 657-682 | ANAHEIM | 6006 | 2023-08-23 | Yes |
| 657-683 | HUNTITNBCH | 6006 | 2023-08-23 | Yes |
| 657-684 | ORANGE | 6529 | 2023-08-23 | Yes |
| 657-685 | ANAHEIM | 6006 | 2023-09-11 | Yes |
| 657-686 | GARDEN GRV | 516J | 2022-02-21 | Yes |
| 657-687 | ANAHEIM | 6006 | 2023-09-12 | Yes |
| 657-688 | PLACENTIA | 965H | 2020-06-01 | Yes |
| 657-689 | CYPRESS | 6006 | 2023-09-12 | Yes |
| 657-690 | HUNTITNBCH | 6006 | 2023-09-13 | Yes |
| 657-691 | ANAHEIM | 6006 | 2023-09-18 | Yes |
| 657-692 | ANAHEIM | 6006 | 2023-09-21 | Yes |
| 657-693 | SANTA ANA | 516J | 2022-01-11 | Yes |
| 657-694 | HUNTITNBCH | 6006 | 2023-09-21 | Yes |
| 657-695 | HUNTITNBCH | 6529 | 2023-09-26 | Yes |
| 657-696 | ANAHEIM | 6006 | 2023-09-29 | Yes |
| 657-697 | HUNTITNBCH | 6006 | 2023-09-29 | Yes |
| 657-698 | WESTMINSTR | 6529 | 2023-09-29 | Yes |
| 657-699 | SANTA ANA | 649C | 2015-03-17 | 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.