All assignees
800 prefixes in 310 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 310-600 | BEVERLYHLS | 6010 | 2001-04-19 | — |
| 310-601 | BEVERLYHLS | 9740 | — | Yes |
| 310-602 | LOMITA | 7229 | — | 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 | — | — |
| 310-610 | CMTN GRDN | 6906 | — | — |
| 310-611 | XXXXXXXXXX | MULT | — | — |
| 310-612 | CMTN GRDN | 6006 | — | — |
| 310-613 | CMTN GRDN | 6006 | — | — |
| 310-614 | BEVERLYHLS | 6010 | 2001-04-19 | — |
| 310-615 | EL SEGUNDO | 9740 | — | — |
| 310-616 | EL SEGUNDO | 9740 | — | Yes |
| 310-617 | CMTN GRDN | 6006 | — | — |
| 310-618 | TORRANCE | 9740 | — | Yes |
| 310-619 | TORRANCE | 6529 | — | Yes |
| 310-620 | BEVERLYHLS | 707H | 2017-03-08 | Yes |
| 310-621 | CULVERCITY | 6529 | — | Yes |
| 310-622 | W ANGELES | 8826 | — | Yes |
| 310-623 | BEVERLYHLS | 671J | — | Yes |
| 310-624 | BEVERLYHLS | 6906 | — | — |
| 310-625 | SNMN MRVS | 6006 | — | — |
| 310-626 | LOMITA | 8826 | — | Yes |
| 310-627 | CMTN CMTN | 373F | 2012-10-09 | Yes |
| 310-628 | SNMN SNMN | 6529 | — | Yes |
| 310-629 | LAKEWOOD | 899D | — | Yes |
| 310-630 | CMTN GRDN | 9740 | — | Yes |
| 310-631 | CMTN CMTN | 9740 | — | — |
| 310-632 | CMTN CMTN | 9740 | — | — |
| 310-633 | SNMN SNMN | 7139 | — | Yes |
| 310-634 | TORRANCE | 6529 | — | Yes |
| 310-635 | CMTN CMTN | 9740 | — | — |
| 310-636 | SNMN MRVS | 2319 | — | — |
| 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 | — | — |
| 310-650 | CMTN GRDN | 6006 | — | — |
| 310-651 | BEVERLYHLS | 7718 | — | Yes |
| 310-652 | BEVERLYHLS | 9740 | — | — |
| 310-653 | EL SEGUNDO | 9740 | 2005-02-23 | Yes |
| 310-654 | INGLEWOOD | 6529 | 2004-11-08 | Yes |
| 310-655 | W ANGELES | 6906 | — | — |
| 310-656 | SNMN SNMN | 2319 | — | — |
| 310-657 | BEVERLYHLS | 9740 | — | — |
| 310-658 | EL SEGUNDO | 7718 | — | Yes |
| 310-659 | BEVERLYHLS | 9740 | — | — |
| 310-660 | CMTN GRDN | 9740 | — | Yes |
| 310-661 | CMTN CMTN | 9740 | — | Yes |
| 310-662 | EL SEGUNDO | 9740 | — | Yes |
| 310-663 | SNMN SNMN | 899D | — | Yes |
| 310-664 | SNMN SNMN | 2319 | — | — |
| 310-665 | INGLEWOOD | 9740 | — | — |
| 310-666 | BEVERLYHLS | 6010 | — | — |
| 310-667 | CMTN CMTN | 7718 | — | Yes |
| 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 | — | — |
| 310-678 | CMTN GRDN | 6529 | — | Yes |
| 310-679 | HAWTHORNE | 9740 | — | — |
| 310-680 | INGLEWOOD | 9740 | — | — |
| 310-681 | CMTN GRDN | 9748 | — | — |
| 310-682 | HAWTHORNE | 7139 | 2017-07-03 | Yes |
| 310-683 | REDONDO | 7139 | — | Yes |
| 310-684 | SAN PEDRO | 6529 | — | Yes |
| 310-685 | CMTN GRDN | 6630 | — | — |
| 310-686 | INGLEWOOD | 6529 | — | Yes |
| 310-687 | CMTN CMTN | 9740 | — | — |
| 310-688 | BEVERLYHLS | 9262 | — | Yes |
| 310-689 | W ANGELES | 7139 | — | Yes |
| 310-690 | W ANGELES | 0051 | 2001-06-26 | — |
| 310-691 | BEVERLYHLS | 8826 | — | Yes |
| 310-692 | INGLEWOOD | 7718 | — | Yes |
| 310-693 | INGLEWOOD | 7229 | — | Yes |
| 310-694 | W ANGELES | 6010 | — | Yes |
| 310-695 | INGLEWOOD | 9740 | — | Yes |
| 310-696 | W ANGELES | 671J | — | Yes |
| 310-697 | REDONDO | 7229 | — | Yes |
| 310-698 | REDONDO | 671J | — | Yes |
| 310-699 | SNMN SNMN | 6010 | 2001-10-18 | — |
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.