All assignees
708 prefixes in 657 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 657-800 | GARDEN GRV | 649C | — | Yes |
| 657-801 | CYPRESS | 6006 | 2025-02-18 | Yes |
| 657-802 | ANAHEIM | 6006 | 2025-03-07 | Yes |
| 657-803 | ANAHEIM | 6006 | 2025-03-13 | Yes |
| 657-804 | ANAHEIM | 6006 | 2025-03-18 | Yes |
| 657-805 | GARDEN GRV | 6006 | 2025-03-27 | Yes |
| 657-806 | HUNTITNBCH | 6006 | 2025-04-02 | Yes |
| 657-807 | WESTMINSTR | 6006 | 2025-04-02 | Yes |
| 657-808 | ANAHEIM | 6006 | 2025-04-03 | Yes |
| 657-809 | ORANGE | 6006 | 2025-04-07 | Yes |
| 657-810 | ANAHEIM | 6006 | 2025-04-25 | Yes |
| 657-811 | MULT | — | — | |
| 657-812 | SANTA ANA | 490J | 2025-04-29 | Yes |
| 657-813 | CYPRESS | 6006 | 2025-05-06 | Yes |
| 657-814 | ANAHEIM | 6006 | 2025-05-08 | Yes |
| 657-815 | ANAHEIM | 6006 | 2025-05-16 | Yes |
| 657-816 | GARDEN GRV | 6006 | 2025-06-04 | Yes |
| 657-817 | ANAHEIM | 6006 | 2025-06-04 | Yes |
| 657-818 | CYPRESS | 6010 | 2025-06-05 | Yes |
| 657-819 | ANAHEIM | 6006 | 2025-06-11 | Yes |
| 657-820 | ANAHEIM | 490J | 2025-06-23 | Yes |
| 657-821 | ANAHEIM | 6006 | 2025-07-10 | Yes |
| 657-822 | ORANGE | 965H | 2021-04-19 | Yes |
| 657-823 | ANAHEIM | 6006 | 2025-07-28 | Yes |
| 657-824 | ANAHEIM | 6006 | 2025-08-06 | Yes |
| 657-825 | ANAHEIM | 6529 | 2024-06-21 | Yes |
| 657-826 | HUNTITNBCH | 6006 | 2025-08-26 | Yes |
| 657-828 | HUNTITNBCH | 6006 | 2025-09-04 | Yes |
| 657-829 | ANAHEIM | 6006 | 2025-09-04 | Yes |
| 657-830 | ANAHEIM | 6006 | 2025-09-23 | Yes |
| 657-831 | ANAHEIM | 6006 | 2025-09-30 | Yes |
| 657-832 | SILVERADO | 516J | 2022-01-12 | Yes |
| 657-833 | SANTA ANA | 965H | 2021-04-22 | Yes |
| 657-834 | ANAHEIM | 6006 | 2025-10-08 | Yes |
| 657-835 | ANAHEIM | 6529 | 2025-11-13 | Yes |
| 657-836 | ANAHEIM | 6006 | 2025-11-14 | Yes |
| 657-837 | BUENA PARK | 516J | 2022-01-10 | Yes |
| 657-838 | GARDEN GRV | 6006 | 2025-11-14 | Yes |
| 657-839 | HUNTITNBCH | 6006 | 2025-11-14 | Yes |
| 657-840 | WESTMINSTR | 6006 | 2025-11-14 | Yes |
| 657-841 | HUNTITNBCH | 6006 | 2025-11-18 | Yes |
| 657-842 | ANAHEIM | 965H | 2020-07-10 | Yes |
| 657-843 | HUNTITNBCH | 6006 | 2026-04-10 | Yes |
| 657-844 | SILVERADO | 965H | 2021-04-20 | Yes |
| 657-845 | HUNTITNBCH | 793K | 2013-03-12 | Yes |
| 657-846 | ANAHEIM | 6006 | 2026-04-10 | Yes |
| 657-847 | GARDEN GRV | 6006 | 2026-04-10 | Yes |
| 657-848 | ANAHEIM | 6006 | 2026-04-17 | Yes |
| 657-849 | WESTMINSTR | 6006 | 2026-04-17 | Yes |
| 657-850 | SILVERADO | 6006 | 2026-04-22 | Yes |
| 657-851 | ANAHEIM | 6006 | 2026-04-23 | Yes |
| 657-852 | ANAHEIM | 6006 | 2026-04-30 | Yes |
| 657-853 | CYPRESS | 6006 | 2026-05-11 | Yes |
| 657-854 | HUNTITNBCH | 6006 | 2026-05-11 | Yes |
| 657-855 | ANAHEIM | 965H | 2021-04-19 | Yes |
| 657-856 | ANAHEIM | 6006 | 2026-05-13 | Yes |
| 657-857 | ORANGE | 321J | 2026-04-21 | Yes |
| 657-858 | HUNTITNBCH | 6006 | 2026-05-21 | Yes |
| 657-859 | SANTA ANA | 394L | — | Yes |
| 657-860 | ANAHEIM | 6006 | 2025-10-23 | Yes |
| 657-861 | HUNTITNBCH | 6006 | 2026-05-13 | Yes |
| 657-862 | ANAHEIM | 6006 | 2026-05-18 | Yes |
| 657-863 | HUNTITNBCH | 6006 | 2026-05-18 | Yes |
| 657-864 | SANTA ANA | 6006 | 2026-05-18 | Yes |
| 657-865 | ANAHEIM | 6006 | 2026-05-20 | Yes |
| 657-866 | YORBALINDA | 965H | 2020-09-21 | Yes |
| 657-867 | HUNTITNBCH | 965H | 2020-07-10 | Yes |
| 657-868 | FULLERTON | 6006 | 2026-05-21 | Yes |
| 657-869 | SANTA ANA | 6006 | 2026-05-21 | Yes |
| 657-870 | WESTMINSTR | 6006 | 2026-05-21 | Yes |
| 657-871 | HUNTITNBCH | 6006 | 2026-05-26 | Yes |
| 657-872 | ANAHEIM | 6006 | 2026-05-26 | Yes |
| 657-873 | ANAHEIM | 6006 | 2026-06-04 | Yes |
| 657-874 | GARDEN GRV | 6006 | 2026-06-04 | Yes |
| 657-875 | HUNTITNBCH | 6006 | 2026-06-04 | Yes |
| 657-876 | WESTMINSTR | 6006 | 2026-06-04 | Yes |
| 657-877 | HUNTITNBCH | 965H | 2019-05-13 | Yes |
| 657-878 | ANAHEIM | 6006 | 2026-06-09 | Yes |
| 657-879 | HUNTITNBCH | 6006 | 2026-06-09 | Yes |
| 657-880 | SILVERADO | 6006 | 2026-06-09 | Yes |
| 657-881 | SANTA ANA | 7139 | 2026-06-11 | Yes |
| 657-882 | PLACENTIA | 6006 | 2026-06-12 | Yes |
| 657-883 | CYPRESS | 6006 | 2026-07-21 | Yes |
| 657-884 | GARDEN GRV | 6006 | 2026-08-07 | Yes |
| 657-885 | HUNTITNBCH | 6006 | 2026-09-09 | Yes |
| 657-886 | SILVERADO | 6006 | 2026-09-09 | Yes |
| 657-888 | ORANGE | 981E | — | Yes |
| 657-895 | HUNTITNBCH | 6006 | 2020-09-23 | Yes |
| 657-897 | ORANGE | 6006 | 2025-11-14 | Yes |
| 657-898 | SANTA ANA | 7139 | 2025-10-22 | Yes |
| 657-899 | SANTA ANA | 965H | 2021-02-25 | Yes |
| 657-900 | SANTA ANA | 981E | — | Yes |
| 657-911 | MULT | — | — | |
| 657-922 | HUNTITNBCH | 965H | 2021-03-09 | Yes |
| 657-933 | ORANGE | 965H | 2020-09-21 | Yes |
| 657-944 | GARDEN GRV | 965H | 2020-11-06 | Yes |
| 657-946 | SILVERADO | 965H | 2020-07-10 | Yes |
| 657-950 | — | — | ||
| 657-955 | WESTMINSTR | 965H | 2020-09-02 | Yes |
| 657-957 | SANTA ANA | 6006 | 2021-10-26 | 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.