All assignees
442 prefixes in 831 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 831-300 | BIG SUR | 8826 | — | Yes |
| 831-301 | SAN JUAN | 373F | — | Yes |
| 831-302 | SAN LUCAS | 8826 | — | Yes |
| 831-303 | SAN ARDO | 373F | — | Yes |
| 831-304 | GREENFIELD | 373F | — | Yes |
| 831-305 | GONZALES | 8826 | — | Yes |
| 831-306 | CHUALAR | 8826 | — | Yes |
| 831-307 | CASTROVL | 8826 | — | Yes |
| 831-308 | CARMEL VLY | 981E | — | Yes |
| 831-309 | CARMEL | 981E | 2017-05-08 | Yes |
| 831-310 | — | — | ||
| 831-311 | XXXXXXXXXX | MULT | — | — |
| 831-312 | MONTEREY | 612K | 2024-03-26 | Yes |
| 831-313 | HOLLISTER | 792K | 2009-06-11 | Yes |
| 831-314 | SANTA CRUZ | 0051 | 2024-09-12 | — |
| 831-315 | SOLEDAD | 373F | 2016-02-15 | Yes |
| 831-316 | SANTA CRUZ | 7240 | — | Yes |
| 831-317 | MONTEREY | 616J | 2024-09-23 | Yes |
| 831-318 | APTOS | 649C | 2016-03-17 | Yes |
| 831-319 | WATSONVL | 7240 | 2001-04-17 | Yes |
| 831-320 | SALINAS | 6006 | — | — |
| 831-321 | SALINAS | 6010 | 2024-12-06 | Yes |
| 831-322 | WATSONVL | 649C | 2016-03-17 | Yes |
| 831-323 | — | — | ||
| 831-324 | MONTEREY | 394L | — | Yes |
| 831-325 | SANTA CRUZ | 5562 | 2001-04-25 | Yes |
| 831-326 | SALINAS | 6010 | 2024-12-06 | Yes |
| 831-327 | HOLLISTER | 6010 | 2024-12-30 | Yes |
| 831-328 | SALINAS | 649C | 2025-03-13 | Yes |
| 831-329 | SALINAS | 478J | 2025-04-21 | Yes |
| 831-330 | CARMEL | 624H | 2023-12-06 | Yes |
| 831-331 | SANTA CRUZ | 6010 | — | Yes |
| 831-332 | SANTA CRUZ | 6010 | — | Yes |
| 831-333 | MONTEREY | 9740 | — | Yes |
| 831-334 | SANTA CRUZ | 6010 | — | Yes |
| 831-335 | FELTON | 9740 | — | — |
| 831-336 | BEN LOMOND | 9740 | — | Yes |
| 831-337 | BOULDERCRK | 7240 | — | Yes |
| 831-338 | BOULDERCRK | 9740 | — | Yes |
| 831-339 | GONZALES | 6010 | 2025-09-04 | Yes |
| 831-340 | SANTA CRUZ | 6006 | 2026-01-15 | Yes |
| 831-343 | SALINAS | 649C | 2026-09-03 | Yes |
| 831-345 | SANTA CRUZ | 6006 | 2001-11-13 | — |
| 831-346 | SANTA CRUZ | 6529 | 2014-09-23 | Yes |
| 831-348 | WATSONVL | 965H | 2019-03-20 | Yes |
| 831-350 | TRES PINOS | 8826 | 2006-05-11 | Yes |
| 831-353 | WATSONVL | 649C | 2016-07-18 | Yes |
| 831-356 | SALINAS | 965H | 2019-12-02 | Yes |
| 831-359 | SANTA CRUZ | 8826 | — | Yes |
| 831-365 | SANTA CRUZ | 649C | 2026-07-24 | Yes |
| 831-366 | BOULDERCRK | 516J | 2022-02-23 | Yes |
| 831-372 | MONTEREY | 9740 | — | — |
| 831-373 | MONTEREY | 9740 | — | — |
| 831-375 | MONTEREY | 9740 | — | — |
| 831-382 | SAN LUCAS | 9740 | — | Yes |
| 831-383 | MONTEREY | 5562 | 2001-09-13 | Yes |
| 831-384 | MONTEREY | 9740 | — | — |
| 831-385 | KING CITY | 9740 | — | — |
| 831-386 | KING CITY | 9740 | — | Yes |
| 831-387 | KING CITY | 981E | — | Yes |
| 831-388 | GREENFIELD | 649C | 2022-09-08 | Yes |
| 831-389 | PINNACLES | 2346 | — | — |
| 831-392 | MONTEREY | 9740 | — | Yes |
| 831-393 | MONTEREY | 9740 | — | Yes |
| 831-394 | MONTEREY | 9740 | — | — |
| 831-400 | SANTA CRUZ | 597F | — | Yes |
| 831-401 | BEN LOMOND | 8826 | — | Yes |
| 831-402 | MONTEREY | 6010 | 2001-11-13 | Yes |
| 831-406 | WATSONVL | 6529 | 2001-12-14 | Yes |
| 831-408 | — | — | ||
| 831-411 | XXXXXXXXXX | MULT | — | — |
| 831-417 | SALINAS | 649C | — | Yes |
| 831-419 | SANTA CRUZ | 6010 | — | — |
| 831-420 | SANTA CRUZ | 9740 | — | Yes |
| 831-421 | SANTA CRUZ | 9740 | — | Yes |
| 831-422 | SALINAS | 9740 | — | — |
| 831-423 | SANTA CRUZ | 9740 | — | — |
| 831-424 | SALINAS | 9740 | — | — |
| 831-425 | SANTA CRUZ | 9740 | — | Yes |
| 831-426 | SANTA CRUZ | 9740 | — | — |
| 831-427 | SANTA CRUZ | 9740 | — | Yes |
| 831-428 | SANTA CRUZ | 5562 | — | Yes |
| 831-429 | SANTA CRUZ | 9740 | — | — |
| 831-430 | SANTA CRUZ | 9740 | — | Yes |
| 831-431 | SANTA CRUZ | 9740 | — | Yes |
| 831-432 | BOULDERCRK | 965H | 2020-12-21 | Yes |
| 831-435 | SANTA CRUZ | 9740 | — | Yes |
| 831-438 | SANTA CRUZ | 9740 | — | — |
| 831-439 | SANTA CRUZ | 9740 | — | Yes |
| 831-440 | SANTA CRUZ | 9740 | — | Yes |
| 831-442 | SALINAS | 9740 | — | Yes |
| 831-443 | SALINAS | 9740 | — | — |
| 831-444 | SALINAS | 9740 | — | Yes |
| 831-449 | SALINAS | 9740 | — | — |
| 831-453 | CASTROVL | 516C | 2011-01-25 | Yes |
| 831-454 | SANTA CRUZ | 9740 | — | Yes |
| 831-455 | SALINAS | 9740 | — | Yes |
| 831-457 | SANTA CRUZ | 9740 | — | — |
| 831-458 | SANTA CRUZ | 9740 | — | — |
| 831-459 | SANTA CRUZ | 9740 | — | — |
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.