All assignees
629 prefixes in 401 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 401-502 | — | — | ||
| 401-503 | — | — | ||
| 401-504 | — | — | ||
| 401-505 | — | — | ||
| 401-506 | — | — | ||
| 401-507 | — | — | ||
| 401-508 | — | — | ||
| 401-509 | — | — | ||
| 401-510 | — | — | ||
| 401-511 | XXXXXXXXXX | MULT | — | — |
| 401-513 | — | — | ||
| 401-514 | — | — | ||
| 401-515 | NARRAGNSTT | 829J | — | Yes |
| 401-516 | PROVIDENCE | 5562 | 2008-07-25 | Yes |
| 401-517 | — | — | ||
| 401-518 | — | — | ||
| 401-519 | PROVIDENCE | 829J | — | Yes |
| 401-521 | PROVIDENCE | 9102 | — | — |
| 401-522 | NO KINGSTN | 7229 | — | Yes |
| 401-523 | PROVIDENCE | 4036 | — | — |
| 401-524 | PROVIDENCE | 6389 | — | — |
| 401-525 | PROVIDENCE | 9102 | — | Yes |
| 401-526 | WOONSOCKET | 4016 | — | Yes |
| 401-527 | PROVIDENCE | 4036 | — | — |
| 401-528 | PROVIDENCE | 9102 | — | Yes |
| 401-529 | PROVIDENCE | 6389 | — | — |
| 401-530 | PROVIDENCE | 939H | 2024-03-06 | Yes |
| 401-531 | WOONSOCKET | 829J | — | Yes |
| 401-532 | WOONSOCKET | 7351 | 2013-11-25 | Yes |
| 401-533 | PROVIDENCE | 6389 | — | Yes |
| 401-534 | WOONSOCKET | 829J | — | Yes |
| 401-535 | W WARWICK | 7351 | — | Yes |
| 401-536 | PROVIDENCE | 6389 | 2006-11-13 | Yes |
| 401-537 | PROVIDENCE | 4016 | — | Yes |
| 401-538 | CUMBLND HL | 6889 | 2025-06-11 | Yes |
| 401-539 | HOPEVALLEY | 9102 | — | Yes |
| 401-540 | CUMBLND HL | 6889 | 2025-08-19 | Yes |
| 401-541 | GREENWICH | 9102 | — | Yes |
| 401-542 | GREENWICH | 4016 | — | Yes |
| 401-543 | PAWTUCKET | 4016 | — | Yes |
| 401-544 | PROVIDENCE | 003F | — | — |
| 401-545 | PROVIDENCE | 6389 | 2009-01-06 | Yes |
| 401-546 | PAWTUCKET | 4036 | 2025-12-08 | Yes |
| 401-547 | CENTREDALE | 671J | 2026-02-20 | Yes |
| 401-548 | PAWTUCKET | 5562 | 2009-04-10 | Yes |
| 401-550 | — | — | ||
| 401-551 | NEWPORT | 7351 | — | Yes |
| 401-552 | CAROLINA | 318J | — | Yes |
| 401-553 | PROVIDENCE | 9102 | — | — |
| 401-555 | DIR ASST | MULT | — | — |
| 401-556 | PROVIDENCE | 4036 | — | — |
| 401-557 | GREENWICH | 7351 | 2025-07-01 | Yes |
| 401-558 | GREENWICH | 829J | — | Yes |
| 401-559 | PROVIDENCE | 5562 | — | Yes |
| 401-560 | JAMESTOWN | 318J | — | Yes |
| 401-561 | WARREN | 977E | — | — |
| 401-562 | WARWICK | 829J | — | Yes |
| 401-563 | PROVIDENCE | 9102 | — | Yes |
| 401-564 | CUMBLND HL | 6889 | — | Yes |
| 401-566 | JAMESTOWN | 4016 | — | Yes |
| 401-567 | PASCOAG | 9102 | — | Yes |
| 401-568 | PASCOAG | 9102 | — | — |
| 401-569 | PROVIDENCE | 4036 | — | Yes |
| 401-570 | PROVIDENCE | 4036 | 2025-10-02 | Yes |
| 401-571 | PROVIDENCE | 700J | 2026-02-09 | Yes |
| 401-572 | PROVIDENCE | 6889 | — | Yes |
| 401-573 | PROVIDENCE | 4036 | — | — |
| 401-574 | PROVIDENCE | 9102 | — | Yes |
| 401-575 | PROVIDENCE | 9102 | — | Yes |
| 401-578 | PROVIDENCE | 6389 | — | — |
| 401-579 | WOONSOCKET | 5562 | — | Yes |
| 401-580 | PROVIDENCE | 4036 | — | — |
| 401-581 | WOONSOCKET | 9102 | — | Yes |
| 401-582 | WOONSOCKET | 9748 | — | — |
| 401-583 | NO KINGSTN | 829J | — | Yes |
| 401-584 | WESTERLY | 318J | — | Yes |
| 401-585 | PROVIDENCE | 6389 | 2008-11-06 | Yes |
| 401-586 | W WARWICK | 829J | — | Yes |
| 401-587 | SCITUATE | 516J | 2022-01-31 | Yes |
| 401-588 | PROVIDENCE | 9102 | — | Yes |
| 401-589 | W WARWICK | 829J | — | Yes |
| 401-591 | PROVIDENCE | 6389 | 2025-10-13 | Yes |
| 401-592 | LTLCOMPTON | 318J | — | Yes |
| 401-593 | WARWICK | 977E | — | — |
| 401-594 | NARRAGNSTT | 4016 | — | Yes |
| 401-595 | PROVIDENCE | 6389 | — | Yes |
| 401-596 | WESTERLY | 9102 | — | — |
| 401-597 | WOONSOCKET | 318J | — | Yes |
| 401-598 | PROVIDENCE | 9102 | — | Yes |
| 401-599 | TIVERTON | 829J | — | Yes |
| 401-600 | PROVIDENCE | 624H | 2018-06-13 | Yes |
| 401-601 | PROVIDENCE | 6389 | 2011-12-14 | Yes |
| 401-602 | PROVIDENCE | 6389 | 2012-09-06 | Yes |
| 401-603 | PROVIDENCE | 363E | 2008-06-12 | Yes |
| 401-604 | WESTERLY | 829J | — | Yes |
| 401-606 | PROVIDENCE | 829J | 2012-04-18 | Yes |
| 401-608 | NEWPORT | 829J | — | Yes |
| 401-610 | COVENTRY | 977E | 2001-07-10 | Yes |
| 401-611 | XXXXXXXXXX | MULT | — | — |
| 401-612 | PROVIDENCE | 6889 | 2011-10-17 | 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.