All assignees
442 prefixes in 831 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 831-855 | MONTEREY | 373F | — | Yes |
| 831-856 | GREENFIELD | 981E | — | Yes |
| 831-858 | — | — | ||
| 831-859 | SALINAS | 321J | 2024-06-20 | Yes |
| 831-867 | MONTEREY | 939H | 2017-03-24 | Yes |
| 831-869 | MONTEREY | 5562 | 2001-07-12 | Yes |
| 831-877 | CARMEL | 965H | 2019-03-20 | Yes |
| 831-880 | MONTEREY | 193E | 2026-05-20 | Yes |
| 831-881 | MONTEREY | 252F | 2025-10-30 | Yes |
| 831-883 | MONTEREY | 9740 | — | Yes |
| 831-884 | MONTEREY | 9740 | — | Yes |
| 831-886 | MONTEREY | 732J | — | Yes |
| 831-887 | MONTEREY | 145J | — | Yes |
| 831-888 | SANTA CRUZ | 649C | — | Yes |
| 831-889 | SANTA CRUZ | 9262 | 2018-06-27 | Yes |
| 831-899 | MONTEREY | 9740 | — | — |
| 831-900 | SANTA CRUZ | 649C | — | Yes |
| 831-901 | MONTEREY | 700J | — | Yes |
| 831-902 | HOLLISTER | 5562 | — | Yes |
| 831-905 | SALINAS | 6010 | — | — |
| 831-909 | — | — | ||
| 831-911 | XXXXXXXXXX | MULT | — | — |
| 831-915 | MONTEREY | 6010 | — | — |
| 831-916 | — | — | ||
| 831-917 | MONTEREY | 6010 | — | Yes |
| 831-920 | MONTEREY | 8826 | 2005-06-03 | Yes |
| 831-921 | TRES PINOS | 8826 | — | Yes |
| 831-931 | KING CITY | 624H | 2023-12-06 | Yes |
| 831-946 | SANTA CRUZ | 965H | 2021-07-13 | Yes |
| 831-948 | WATSONVL | 9262 | 2015-04-03 | Yes |
| 831-949 | — | — | ||
| 831-950 | — | — | ||
| 831-951 | — | — | ||
| 831-958 | — | — | ||
| 831-959 | — | — | ||
| 831-970 | SALINAS | 6529 | — | Yes |
| 831-975 | SALINAS | 394L | — | Yes |
| 831-976 | — | — | ||
| 831-988 | — | — | ||
| 831-996 | TRES PINOS | 515J | — | Yes |
| 831-998 | SALINAS | 7240 | 2003-07-17 | Yes |
| 831-999 | SANTA CRUZ | 373F | 2016-04-06 | 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.