All assignees
800 prefixes in 508 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 508-500 | MARION | 4018 | — | Yes |
| 508-501 | NEWBEDFORD | 7135 | — | Yes |
| 508-502 | WORCESTER | 9102 | 2003-02-05 | Yes |
| 508-503 | PLYMOUTH | 4018 | — | Yes |
| 508-504 | WEBSTER | 892D | 2018-03-05 | Yes |
| 508-505 | WALPOLE | 7229 | — | Yes |
| 508-506 | OXFORD | 829J | 2003-06-19 | Yes |
| 508-507 | FRANKLIN | 4018 | 2001-06-14 | Yes |
| 508-508 | WORCESTER | 125L | 2025-03-04 | Yes |
| 508-509 | ROCHESTER | 6889 | — | Yes |
| 508-510 | BROCKTON | 7619 | — | Yes |
| 508-511 | XXXXXXXXXX | MULT | — | — |
| 508-512 | — | — | ||
| 508-513 | BROCKTON | 7135 | — | Yes |
| 508-514 | WELLFLEET | 829J | — | Yes |
| 508-515 | — | — | ||
| 508-516 | — | — | ||
| 508-517 | WESTFORD | 4036 | — | — |
| 508-518 | FRAMINGHAM | 7135 | — | — |
| 508-519 | WORCESTER | 7229 | — | Yes |
| 508-520 | FRANKLIN | 9102 | — | — |
| 508-521 | BROCKTON | 829J | — | Yes |
| 508-522 | FRAMINGHAM | 9102 | — | — |
| 508-523 | SHREWSBURY | 6387 | — | — |
| 508-524 | FALMOUTH | 4036 | — | — |
| 508-525 | NEWBEDFORD | 7619 | — | Yes |
| 508-526 | UXBRIDGE | 7229 | — | Yes |
| 508-527 | PEABODY | 4036 | — | — |
| 508-528 | FRANKLIN | 9102 | — | — |
| 508-529 | UPTON | 9102 | — | Yes |
| 508-530 | FRANKLIN | 7229 | — | Yes |
| 508-531 | BRIDGEWTR | 829J | — | — |
| 508-532 | FRAMINGHAM | 829J | — | — |
| 508-533 | MEDWAY | 9102 | — | — |
| 508-534 | HYANNIS | 4018 | — | Yes |
| 508-535 | EASTON | 829J | — | Yes |
| 508-536 | FALL RIVER | 4018 | — | Yes |
| 508-537 | AUBURN | 9748 | — | — |
| 508-538 | MARION | 829J | — | Yes |
| 508-539 | OSTERVILLE | 9102 | — | — |
| 508-540 | FALMOUTH | 9102 | — | — |
| 508-541 | FRANKLIN | 9102 | — | Yes |
| 508-542 | NEWBEDFORD | 4036 | — | — |
| 508-543 | FOXBORO | 9102 | — | — |
| 508-544 | HOPKINTON | 9102 | — | Yes |
| 508-545 | NATICK | 318J | — | Yes |
| 508-546 | FOXBORO | 7229 | — | Yes |
| 508-547 | FALL RIVER | 6083 | — | — |
| 508-548 | FALMOUTH | 9102 | — | — |
| 508-549 | FOXBORO | 9102 | — | — |
| 508-550 | — | — | ||
| 508-551 | WORCESTER | 9102 | 2002-03-12 | — |
| 508-552 | WORCESTER | 829J | — | Yes |
| 508-553 | FRANKLIN | 9102 | — | — |
| 508-554 | XXXXXXXXXX | 9102 | — | — |
| 508-555 | DIR ASST | MULT | — | — |
| 508-556 | WORCESTER | 4018 | — | Yes |
| 508-557 | SEEKONK | 318J | — | Yes |
| 508-558 | FALL RIVER | 4018 | — | Yes |
| 508-559 | BROCKTON | 9102 | — | — |
| 508-560 | VINEYRDHVN | 4036 | — | — |
| 508-561 | FRAMINGHAM | 6387 | — | — |
| 508-562 | BROCKTON | 4018 | — | Yes |
| 508-563 | CATAUMET | 9102 | — | Yes |
| 508-564 | CATAUMET | 9102 | — | Yes |
| 508-565 | EASTON | 9102 | — | Yes |
| 508-566 | CATAUMET | 4036 | — | Yes |
| 508-567 | FALL RIVER | 318J | — | Yes |
| 508-568 | HYANNIS | 829J | — | Yes |
| 508-569 | WORCESTER | 9102 | — | — |
| 508-570 | FRANKLIN | 4018 | 2001-04-11 | Yes |
| 508-571 | NORTHBORO | 7135 | — | Yes |
| 508-572 | BILLERICA | 4036 | — | — |
| 508-573 | MARLBORO | 7229 | — | Yes |
| 508-574 | BILLERICA | 4036 | — | — |
| 508-575 | TAUNTON | 174A | 2003-09-29 | — |
| 508-576 | NO ATTLEBO | 4018 | — | Yes |
| 508-577 | BROCKTON | 4036 | — | — |
| 508-578 | DOVER | 990E | — | — |
| 508-579 | WORCESTER | 5562 | — | Yes |
| 508-580 | BROCKTON | 9102 | — | — |
| 508-581 | MILLBURY | 9102 | — | Yes |
| 508-582 | HYANNIS | 6083 | — | — |
| 508-583 | BROCKTON | 9102 | — | — |
| 508-584 | BROCKTON | 9102 | — | — |
| 508-585 | BRIDGEWTR | 6083 | — | — |
| 508-586 | BROCKTON | 9102 | — | — |
| 508-587 | BROCKTON | 9102 | — | — |
| 508-588 | BROCKTON | 9102 | — | — |
| 508-589 | HOPKINTON | 7229 | — | Yes |
| 508-590 | FRANKLIN | 7229 | — | Yes |
| 508-591 | PLYMOUTH | 7135 | — | Yes |
| 508-592 | FRAMINGHAM | 9102 | — | Yes |
| 508-593 | CHATHAM | 4018 | — | Yes |
| 508-594 | MANSFIELD | 7135 | — | Yes |
| 508-595 | WORCESTER | 9102 | — | Yes |
| 508-596 | FRAMINGHAM | 4036 | — | — |
| 508-597 | MARLBORO | 7229 | — | Yes |
| 508-598 | FRAMINGHAM | 7229 | — | Yes |
| 508-599 | WESTBORO | 7229 | — | 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.