All assignees
800 prefixes in 310 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 310-500 | W ANGELES | 7718 | — | Yes |
| 310-501 | CMTN CMTN | 6630 | — | — |
| 310-502 | CMTN GRDN | 6006 | — | — |
| 310-503 | CMTN GRDN | 6010 | 2001-04-19 | — |
| 310-504 | REDONDO | 373F | 2012-10-04 | Yes |
| 310-505 | CMTN GRDN | 6529 | — | Yes |
| 310-506 | MALIBU | 671J | — | Yes |
| 310-507 | SAN PEDRO | 7240 | — | Yes |
| 310-508 | CMTN GRDN | 6006 | — | — |
| 310-509 | CMTN CMTN | 6630 | — | — |
| 310-510 | AVALON | 9740 | — | Yes |
| 310-511 | XXXXXXXXXX | MULT | — | — |
| 310-512 | CMTN GRDN | 9740 | — | — |
| 310-513 | SAN PEDRO | 9740 | — | Yes |
| 310-514 | SAN PEDRO | 9740 | — | Yes |
| 310-515 | CMTN GRDN | 9740 | — | — |
| 310-516 | CMTN GRDN | 9740 | — | — |
| 310-517 | LOMITA | 9740 | — | — |
| 310-518 | SAN PEDRO | 9740 | — | — |
| 310-519 | SAN PEDRO | 9740 | — | — |
| 310-520 | LSAN DA 14 | 9740 | — | — |
| 310-521 | SAN PEDRO | 9740 | — | — |
| 310-522 | SAN PEDRO | 9740 | — | — |
| 310-523 | CMTN GRDN | 9740 | — | — |
| 310-524 | EL SEGUNDO | 9740 | — | — |
| 310-525 | CMTN GRDN | 7139 | — | Yes |
| 310-526 | SNMN SNMN | 7240 | — | Yes |
| 310-527 | CMTN GRDN | 9740 | — | Yes |
| 310-528 | CMTN GRDN | 6010 | — | — |
| 310-529 | EL SEGUNDO | 6010 | — | — |
| 310-530 | LOMITA | 9740 | — | — |
| 310-531 | HAWTHORNE | 7139 | — | Yes |
| 310-532 | CMTN GRDN | 9740 | — | — |
| 310-533 | TORRANCE | 9740 | — | Yes |
| 310-534 | LOMITA | 9740 | — | — |
| 310-535 | EL SEGUNDO | 9740 | — | — |
| 310-536 | HAWTHORNE | 9740 | — | Yes |
| 310-537 | CMTN CMTN | 9740 | — | — |
| 310-538 | CMTN GRDN | 9740 | — | — |
| 310-539 | LOMITA | 9740 | — | — |
| 310-540 | REDONDO | 2319 | — | — |
| 310-541 | REDONDO | 2319 | — | — |
| 310-542 | REDONDO | 2319 | — | — |
| 310-543 | REDONDO | 2319 | — | — |
| 310-544 | REDONDO | 2319 | — | — |
| 310-545 | REDONDO | 2319 | — | — |
| 310-546 | REDONDO | 2319 | — | — |
| 310-547 | SAN PEDRO | 9740 | — | Yes |
| 310-548 | SAN PEDRO | 9740 | — | — |
| 310-549 | SAN PEDRO | 9740 | — | — |
| 310-550 | BEVERLYHLS | 9740 | — | — |
| 310-551 | BEVERLYHLS | 9740 | — | — |
| 310-552 | BEVERLYHLS | 9740 | — | — |
| 310-553 | BEVERLYHLS | 9740 | — | — |
| 310-554 | CMTN CMTN | 6529 | 2017-01-16 | Yes |
| 310-555 | DIR ASST | MULT | — | — |
| 310-556 | BEVERLYHLS | 9740 | — | — |
| 310-557 | BEVERLYHLS | 9740 | — | Yes |
| 310-558 | CULVERCITY | 9740 | — | Yes |
| 310-559 | CULVERCITY | 9740 | — | — |
| 310-560 | SNMN MRVS | 6006 | — | — |
| 310-561 | TORRANCE | 6529 | 2005-02-22 | Yes |
| 310-562 | W ANGELES | 6010 | 2001-04-17 | — |
| 310-563 | EL SEGUNDO | 9740 | — | — |
| 310-564 | SNMN SNMN | 649C | — | Yes |
| 310-565 | EL SEGUNDO | 7139 | 2020-08-28 | Yes |
| 310-566 | SNMN SNMN | 671J | — | — |
| 310-567 | CMTN GRDN | 6010 | — | — |
| 310-568 | INGLEWOOD | 9740 | — | — |
| 310-569 | SNMN MRVS | 6006 | — | — |
| 310-570 | SNMN SNMN | 2319 | — | Yes |
| 310-571 | W ANGELES | 2319 | — | Yes |
| 310-572 | SNMN MRVS | 2319 | — | — |
| 310-573 | SNMN SNMN | 2319 | — | Yes |
| 310-574 | SNMN MRVS | 2319 | — | Yes |
| 310-575 | W ANGELES | 2319 | — | Yes |
| 310-576 | SNMN SNMN | 2319 | — | — |
| 310-577 | SNMN MRVS | 2319 | — | — |
| 310-578 | SNMN MRVS | 2319 | — | — |
| 310-579 | MALIBU | 7240 | — | Yes |
| 310-580 | SNMN SNMN | 9262 | — | — |
| 310-581 | SNMN SNMN | 2319 | — | — |
| 310-582 | SNMN SNMN | 2319 | — | Yes |
| 310-583 | SNMN SNMN | 6967 | — | — |
| 310-584 | SNMN SNMN | 2319 | — | Yes |
| 310-585 | SNMN SNMN | 6630 | — | — |
| 310-586 | SNMN SNMN | 2319 | — | — |
| 310-587 | SNMN SNMN | 2319 | — | — |
| 310-588 | SNMN SNMN | 6630 | — | — |
| 310-589 | MALIBU | 2319 | — | Yes |
| 310-590 | INGLEWOOD | 6529 | — | Yes |
| 310-591 | SNMN MRVS | 7718 | — | Yes |
| 310-592 | W ANGELES | 6010 | — | — |
| 310-593 | SNMN SNMN | 7229 | — | Yes |
| 310-594 | CMTN GRDN | 6529 | — | Yes |
| 310-595 | BEVERLYHLS | 7229 | — | Yes |
| 310-596 | CULVERCITY | 6006 | 2012-08-08 | Yes |
| 310-597 | W ANGELES | 8826 | — | Yes |
| 310-598 | BEVERLYHLS | 7139 | — | Yes |
| 310-599 | CMTN CMTN | 6967 | — | — |
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.