All assignees
782 prefixes in 313 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 313-500 | DETROITZN5 | 6003 | 2022-08-29 | Yes |
| 313-501 | DETROITZN6 | 6534 | 2025-03-27 | Yes |
| 313-502 | DETROITZN1 | 2964 | 2013-11-27 | Yes |
| 313-503 | DETROITZN5 | 9748 | — | — |
| 313-504 | DETROITZN3 | 543C | 2021-11-24 | Yes |
| 313-505 | DETROITZN5 | 6534 | — | — |
| 313-506 | DETROITZN5 | 6534 | — | — |
| 313-507 | DETROITZN5 | 9323 | — | — |
| 313-508 | DETROITZN5 | 9323 | — | — |
| 313-509 | DETROITZN2 | 2964 | 2016-01-13 | Yes |
| 313-510 | DETROITZN5 | 6534 | — | — |
| 313-511 | XXXXXXXXXX | MULT | — | — |
| 313-512 | DETROITZN4 | 6120 | 2020-08-19 | Yes |
| 313-513 | DETROITZN1 | 543C | 2020-09-02 | Yes |
| 313-514 | DETROITZN4 | 543C | 2021-06-16 | Yes |
| 313-515 | DETROITZN5 | 6534 | — | — |
| 313-516 | DETROITZN5 | 2964 | — | Yes |
| 313-518 | DETROITZN5 | 543C | — | Yes |
| 313-519 | DETROITZN3 | 2964 | 2023-11-16 | Yes |
| 313-520 | DETROITZN5 | 6534 | — | — |
| 313-521 | DETROITZN2 | 9323 | — | — |
| 313-522 | DETROITZN6 | 2964 | — | — |
| 313-523 | DETROITZN6 | 2964 | — | Yes |
| 313-524 | DETROITZN1 | 622J | — | Yes |
| 313-525 | DETROITZN6 | 2964 | — | Yes |
| 313-526 | DETROITZN2 | 9323 | — | — |
| 313-527 | DETROITZN2 | 9323 | — | — |
| 313-528 | DETROITZN6 | 543C | — | Yes |
| 313-529 | DETROITZN6 | 2964 | — | — |
| 313-530 | DETROITZN5 | 6003 | — | — |
| 313-531 | DETROITZN5 | 9323 | — | — |
| 313-532 | DETROITZN5 | 9323 | — | — |
| 313-533 | DETROITZN5 | 9323 | — | — |
| 313-534 | DETROITZN5 | 9323 | — | — |
| 313-535 | DETROITZN5 | 9323 | — | — |
| 313-536 | DETROITZN4 | 991E | 2021-02-16 | Yes |
| 313-537 | DETROITZN5 | 9323 | — | — |
| 313-538 | DETROITZN5 | 9323 | — | — |
| 313-539 | DETROITZN5 | 6534 | — | Yes |
| 313-540 | DETROITZN4 | 197D | 2021-10-19 | Yes |
| 313-541 | DETROITZN5 | 9323 | — | — |
| 313-542 | DETROITZN5 | 991E | 2021-04-12 | Yes |
| 313-543 | DETROITZN5 | 9323 | — | Yes |
| 313-544 | DETROITZN4 | 5562 | — | Yes |
| 313-545 | DETROITZN1 | 9323 | 2013-10-24 | Yes |
| 313-546 | DETROITZN1 | 770E | 2020-07-02 | Yes |
| 313-547 | DETROITZN5 | 321J | 2021-06-02 | Yes |
| 313-548 | DETROITZN2 | 991E | 2021-02-12 | Yes |
| 313-549 | DETROITZN5 | 6003 | — | — |
| 313-550 | DETROITZN5 | 6003 | — | — |
| 313-551 | DETROITZN6 | 9323 | — | Yes |
| 313-552 | DETROITZN1 | 321J | 2020-09-30 | Yes |
| 313-553 | DETROITZN1 | 9323 | — | — |
| 313-554 | DETROITZN6 | 9323 | — | Yes |
| 313-555 | DIR ASST | MULT | — | — |
| 313-556 | DETROITZN1 | 9323 | — | Yes |
| 313-557 | DETROITZN1 | 7279 | — | Yes |
| 313-558 | DETROITZN6 | 991E | 2014-10-06 | Yes |
| 313-559 | DETROITZN5 | 6120 | — | Yes |
| 313-560 | DETROITZN5 | 9323 | — | — |
| 313-561 | DETROITZN6 | 9323 | — | — |
| 313-562 | DETROITZN6 | 9323 | — | — |
| 313-563 | DETROITZN6 | 9323 | — | — |
| 313-564 | DETROITZN3 | 9323 | — | Yes |
| 313-565 | DETROITZN6 | 9323 | — | — |
| 313-566 | DETROITZN1 | 9323 | — | Yes |
| 313-567 | DETROITZN1 | 9323 | — | — |
| 313-568 | DETROITZN1 | 9323 | — | — |
| 313-569 | DETROITZN5 | 6003 | 2021-04-12 | Yes |
| 313-570 | DETROITZN5 | 6003 | — | — |
| 313-571 | DETROITZN2 | 9323 | — | Yes |
| 313-572 | DETROITZN1 | 543C | 2021-07-07 | Yes |
| 313-573 | DETROITZN5 | 6003 | — | Yes |
| 313-574 | DETROITZN5 | 2964 | — | Yes |
| 313-575 | DETROITZN5 | 2964 | — | Yes |
| 313-576 | DETROITZN1 | 9323 | — | Yes |
| 313-577 | DETROITZN1 | 9323 | — | — |
| 313-578 | DETROITZN1 | 9323 | — | Yes |
| 313-579 | DETROITZN2 | 9323 | — | Yes |
| 313-580 | DETROITZN5 | 6003 | — | — |
| 313-581 | DETROITZN6 | 9323 | — | — |
| 313-582 | DETROITZN6 | 9323 | — | — |
| 313-583 | DETROITZN6 | 9323 | — | Yes |
| 313-584 | DETROITZN6 | 9323 | — | — |
| 313-585 | DETROITZN5 | 2964 | — | Yes |
| 313-586 | DETROITZN6 | 6120 | — | Yes |
| 313-587 | DETROITZN5 | 2964 | — | Yes |
| 313-588 | DETROITZN5 | 6003 | — | Yes |
| 313-589 | DETROITZN4 | 2964 | 2023-11-16 | Yes |
| 313-590 | DETROITZN5 | 6003 | — | — |
| 313-591 | DETROITZN3 | 991E | 2020-10-14 | Yes |
| 313-592 | DETROITZN5 | 9323 | — | — |
| 313-593 | DETROITZN6 | 9323 | — | — |
| 313-594 | DETROITZN6 | 9323 | — | — |
| 313-595 | DETROITZN5 | 2964 | — | Yes |
| 313-596 | DETROITZN1 | 9323 | — | — |
| 313-597 | DETROITZN5 | 6003 | 2021-01-12 | Yes |
| 313-598 | DETROITZN5 | 2964 | — | Yes |
| 313-599 | DETROITZN5 | 9323 | — | — |
| 313-600 | DETROITZN5 | 6003 | — | — |
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.