PACIFIC BELL
250 prefixes in 310 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 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 | — | — |
| 310-527 | CMTN GRDN | 9740 | — | Yes |
| 310-530 | LOMITA | 9740 | — | — |
| 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 | — | — |
| 310-547 | 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 | — | — |
| 310-556 | BEVERLYHLS | 9740 | — | — |
| 310-557 | BEVERLYHLS | 9740 | — | Yes |
| 310-558 | CULVERCITY | 9740 | — | Yes |
| 310-559 | CULVERCITY | 9740 | — | — |
| 310-563 | EL SEGUNDO | 9740 | — | — |
| 310-568 | INGLEWOOD | 9740 | — | — |
| 310-601 | BEVERLYHLS | 9740 | — | Yes |
| 310-603 | CMTN CMTN | 9740 | — | — |
| 310-604 | CMTN CMTN | 9740 | — | — |
| 310-605 | CMTN CMTN | 9740 | — | — |
| 310-606 | EL SEGUNDO | 9740 | — | Yes |
| 310-607 | EL SEGUNDO | 9740 | — | — |
| 310-608 | CMTN CMTN | 9740 | — | — |
| 310-609 | CMTN CMTN | 9740 | — | — |
| 310-615 | EL SEGUNDO | 9740 | — | — |
| 310-616 | EL SEGUNDO | 9740 | — | Yes |
| 310-618 | TORRANCE | 9740 | — | Yes |
| 310-630 | CMTN GRDN | 9740 | — | Yes |
| 310-631 | CMTN CMTN | 9740 | — | — |
| 310-632 | CMTN CMTN | 9740 | — | — |
| 310-635 | CMTN CMTN | 9740 | — | — |
| 310-637 | CMTN CMTN | 9740 | — | — |
| 310-638 | CMTN CMTN | 9740 | — | — |
| 310-639 | CMTN CMTN | 9740 | — | — |
| 310-640 | EL SEGUNDO | 9740 | — | — |
| 310-641 | INGLEWOOD | 9740 | — | — |
| 310-642 | INGLEWOOD | 9740 | — | Yes |
| 310-643 | HAWTHORNE | 9740 | — | — |
| 310-644 | HAWTHORNE | 9740 | — | — |
| 310-645 | INGLEWOOD | 9740 | — | — |
| 310-646 | INGLEWOOD | 9740 | — | — |
| 310-647 | EL SEGUNDO | 9740 | — | Yes |
| 310-648 | EL SEGUNDO | 9740 | — | Yes |
| 310-649 | INGLEWOOD | 9740 | — | — |
| 310-652 | BEVERLYHLS | 9740 | — | — |
| 310-653 | EL SEGUNDO | 9740 | 2005-02-23 | Yes |
| 310-657 | BEVERLYHLS | 9740 | — | — |
| 310-659 | BEVERLYHLS | 9740 | — | — |
| 310-660 | CMTN GRDN | 9740 | — | Yes |
| 310-661 | CMTN CMTN | 9740 | — | Yes |
| 310-662 | EL SEGUNDO | 9740 | — | Yes |
| 310-665 | INGLEWOOD | 9740 | — | — |
| 310-668 | CMTN CMTN | 9740 | — | Yes |
| 310-669 | CMTN CMTN | 9740 | — | — |
| 310-670 | INGLEWOOD | 9740 | — | — |
| 310-671 | INGLEWOOD | 9740 | — | — |
| 310-672 | INGLEWOOD | 9740 | — | — |
| 310-673 | INGLEWOOD | 9740 | — | — |
| 310-674 | INGLEWOOD | 9740 | — | — |
| 310-675 | HAWTHORNE | 9740 | — | — |
| 310-676 | HAWTHORNE | 9740 | — | — |
| 310-677 | INGLEWOOD | 9740 | — | — |
| 310-679 | HAWTHORNE | 9740 | — | — |
| 310-680 | INGLEWOOD | 9740 | — | — |
| 310-687 | CMTN CMTN | 9740 | — | — |
| 310-695 | INGLEWOOD | 9740 | — | Yes |
| 310-712 | BEVERLYHLS | 9740 | — | — |
| 310-715 | CMTN GRDN | 9740 | — | Yes |
| 310-719 | CMTN GRDN | 9740 | — | Yes |
| 310-724 | BEVERLYHLS | 9740 | — | — |
| 310-725 | HAWTHORNE | 9740 | — | Yes |
| 310-726 | EL SEGUNDO | 9740 | — | — |
| 310-727 | HAWTHORNE | 9740 | — | — |
| 310-732 | SAN PEDRO | 9740 | — | — |
| 310-761 | CMTN CMTN | 9740 | — | — |
| 310-762 | CMTN CMTN | 9740 | — | — |
| 310-763 | CMTN CMTN | 9740 | — | — |
| 310-764 | CMTN CMTN | 9740 | — | — |
| 310-767 | CMTN GRDN | 9740 | — | Yes |
| 310-768 | CMTN GRDN | 9740 | — | Yes |
| 310-769 | CMTN GRDN | 9740 | — | Yes |
| 310-771 | CMTN GRDN | 9740 | — | — |
| 310-772 | BEVERLYHLS | 9740 | — | — |
| 310-777 | BEVERLYHLS | 9740 | — | Yes |
| 310-781 | TORRANCE | 9740 | — | Yes |
| 310-782 | TORRANCE | 9740 | — | Yes |
| 310-783 | TORRANCE | 9740 | — | — |
| 310-784 | LOMITA | 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.