All assignees
442 prefixes in 831 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 831-460 | SANTA CRUZ | 9740 | — | Yes |
| 831-461 | SANTA CRUZ | 9740 | — | Yes |
| 831-462 | SANTA CRUZ | 9740 | — | — |
| 831-464 | SANTA CRUZ | 9740 | — | — |
| 831-465 | SANTA CRUZ | 9740 | — | Yes |
| 831-466 | SANTA CRUZ | 9740 | — | Yes |
| 831-468 | MONTEREY | 114J | 2026-03-30 | Yes |
| 831-469 | SANTA CRUZ | 9740 | — | Yes |
| 831-471 | SANTA CRUZ | 9740 | — | Yes |
| 831-475 | SANTA CRUZ | 9740 | — | — |
| 831-476 | SANTA CRUZ | 9740 | — | — |
| 831-477 | SANTA CRUZ | 9740 | — | Yes |
| 831-479 | SANTA CRUZ | 9740 | — | — |
| 831-480 | SANTA CRUZ | 649C | — | — |
| 831-484 | SALINAS | 9740 | — | Yes |
| 831-498 | WATSONVL | 515J | — | Yes |
| 831-500 | SALINAS | 5562 | — | Yes |
| 831-502 | SANTA CRUZ | 9740 | — | — |
| 831-508 | FELTON | 515J | — | Yes |
| 831-510 | — | — | ||
| 831-511 | XXXXXXXXXX | MULT | — | — |
| 831-512 | SALINAS | 6529 | — | Yes |
| 831-515 | SANTA CRUZ | 671J | — | Yes |
| 831-521 | MONTEREY | 6010 | — | — |
| 831-524 | HOLLISTER | 6010 | — | Yes |
| 831-525 | KING CITY | 8826 | — | Yes |
| 831-529 | SANTA CRUZ | 965H | 2020-03-27 | Yes |
| 831-531 | APTOS | 7229 | — | Yes |
| 831-532 | BEN LOMOND | 649C | — | Yes |
| 831-533 | BOULDERCRK | 7229 | — | Yes |
| 831-534 | FELTON | 7229 | — | Yes |
| 831-535 | SANTA CRUZ | 7229 | — | Yes |
| 831-536 | WATSONVL | 7229 | — | Yes |
| 831-537 | HOLLISTER | 6006 | — | Yes |
| 831-539 | WATSONVL | 6529 | — | Yes |
| 831-540 | SALINAS | 6006 | — | Yes |
| 831-555 | DIR ASST | MULT | — | — |
| 831-562 | — | — | ||
| 831-566 | SANTA CRUZ | 6006 | 2002-06-14 | — |
| 831-572 | APTOS | 9262 | — | Yes |
| 831-574 | CARMEL | 671J | — | Yes |
| 831-575 | SANTA CRUZ | 9740 | — | — |
| 831-576 | SANTA CRUZ | 649C | — | Yes |
| 831-578 | SALINAS | 6010 | — | Yes |
| 831-580 | GONZALES | 515J | — | Yes |
| 831-582 | MONTEREY | 9740 | — | Yes |
| 831-583 | MONTEREY | 9740 | — | Yes |
| 831-585 | SALINAS | 5562 | 2005-02-18 | Yes |
| 831-586 | SAN JUAN | 515J | — | Yes |
| 831-587 | WATSONVL | 965H | 2021-08-23 | Yes |
| 831-588 | SANTA CRUZ | 6006 | — | — |
| 831-593 | SAN JUAN | 792K | — | Yes |
| 831-594 | SALINAS | 6010 | — | — |
| 831-595 | SALINAS | 6010 | — | — |
| 831-596 | SALINAS | 6010 | — | — |
| 831-597 | SALINAS | 373F | — | Yes |
| 831-600 | SANTA CRUZ | 671J | — | Yes |
| 831-601 | MONTEREY | 6006 | — | — |
| 831-603 | APTOS | 649C | — | — |
| 831-604 | BEN LOMOND | 649C | — | — |
| 831-607 | APTOS | 515J | — | Yes |
| 831-609 | BEN LOMOND | 649C | — | Yes |
| 831-610 | BOULDERCRK | 649C | — | Yes |
| 831-611 | XXXXXXXXXX | MULT | — | — |
| 831-612 | APTOS | 8826 | — | Yes |
| 831-613 | GREENFIELD | 981E | — | Yes |
| 831-618 | BOULDERCRK | 649C | — | — |
| 831-619 | — | — | ||
| 831-620 | CARMEL | 9740 | — | Yes |
| 831-621 | SANTA CRUZ | 8826 | — | Yes |
| 831-622 | CARMEL | 9740 | — | — |
| 831-623 | SAN JUAN | 9740 | — | Yes |
| 831-624 | CARMEL | 9740 | — | — |
| 831-625 | CARMEL | 9740 | — | — |
| 831-626 | CARMEL | 9740 | — | — |
| 831-627 | SAN ARDO | 9740 | — | Yes |
| 831-628 | TRES PINOS | 9740 | — | Yes |
| 831-630 | HOLLISTER | 9740 | — | Yes |
| 831-632 | CASTROVL | 9740 | — | Yes |
| 831-633 | CASTROVL | 9740 | — | Yes |
| 831-634 | HOLLISTER | 9740 | — | Yes |
| 831-635 | HOLLISTER | 9740 | — | Yes |
| 831-636 | HOLLISTER | 9740 | — | — |
| 831-637 | HOLLISTER | 9740 | — | — |
| 831-638 | HOLLISTER | 9740 | — | — |
| 831-641 | MONTEREY | 9740 | — | Yes |
| 831-642 | MONTEREY | 9740 | — | — |
| 831-643 | MONTEREY | 9740 | — | Yes |
| 831-644 | MONTEREY | 9740 | — | — |
| 831-645 | MONTEREY | 9740 | — | — |
| 831-646 | MONTEREY | 9740 | — | — |
| 831-647 | MONTEREY | 9740 | — | — |
| 831-648 | MONTEREY | 9740 | — | — |
| 831-649 | MONTEREY | 9740 | — | Yes |
| 831-650 | — | — | ||
| 831-652 | CARMEL VLY | 8826 | — | Yes |
| 831-653 | SAN LUCAS | 515J | — | Yes |
| 831-655 | MONTEREY | 9740 | — | — |
| 831-656 | MONTEREY | 9740 | — | Yes |
| 831-657 | MONTEREY | 9740 | — | 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.