All assignees
800 prefixes in 508 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 508-300 | FALL RIVER | 7229 | — | Yes |
| 508-301 | TAUNTON | 990E | — | Yes |
| 508-302 | FRAMINGHAM | 7229 | — | Yes |
| 508-303 | MARLBORO | 9102 | — | — |
| 508-304 | WORCESTER | 6889 | — | Yes |
| 508-305 | MARLBORO | 7135 | — | Yes |
| 508-306 | HOLLISTON | 4018 | — | Yes |
| 508-307 | TAUNTON | 9748 | — | — |
| 508-308 | FRAMINGHAM | 4036 | 2002-07-08 | Yes |
| 508-309 | FRAMINGHAM | 7135 | — | Yes |
| 508-310 | NATICK | 7229 | — | Yes |
| 508-311 | XXXXXXXXXX | MULT | — | — |
| 508-312 | FRAMINGHAM | 9102 | — | — |
| 508-313 | BROCKTON | 4018 | — | Yes |
| 508-314 | NATICK | 4036 | — | — |
| 508-315 | NATICK | 7619 | — | Yes |
| 508-316 | NO ATTLEBO | 318J | — | Yes |
| 508-317 | WAREHAM | 4036 | — | — |
| 508-318 | NATICK | 7229 | — | Yes |
| 508-319 | NATICK | 829J | — | Yes |
| 508-320 | GRAFTON | 6387 | — | — |
| 508-321 | MEDWAY | 318J | — | Yes |
| 508-322 | WAREHAM | 4036 | 2005-03-25 | Yes |
| 508-323 | FRAMINGHAM | 9102 | — | — |
| 508-324 | FALL RIVER | 9102 | — | Yes |
| 508-325 | NANTUCKET | 9102 | — | Yes |
| 508-326 | BROCKTON | 5562 | — | Yes |
| 508-327 | AUBURN | 9748 | — | — |
| 508-328 | HOPKINTON | 5562 | — | Yes |
| 508-329 | WESTBORO | 4018 | — | Yes |
| 508-330 | WESTBORO | 6387 | — | — |
| 508-331 | FITCHBURG | 4036 | — | — |
| 508-332 | NANTUCKET | 4018 | — | Yes |
| 508-333 | NATICK | 6889 | — | — |
| 508-334 | WORCESTER | 9102 | — | — |
| 508-335 | WORCESTER | 4036 | — | — |
| 508-336 | SEEKONK | 9102 | — | Yes |
| 508-337 | MANSFIELD | 9102 | — | — |
| 508-338 | VINEYRDHVN | 4018 | — | Yes |
| 508-339 | MANSFIELD | 9102 | — | — |
| 508-340 | WORCESTER | 4018 | 2002-02-27 | Yes |
| 508-341 | E DOUGLAS | 6387 | — | — |
| 508-342 | ATTLEBORO | 829J | — | Yes |
| 508-343 | SEEKONK | 7135 | — | Yes |
| 508-344 | STURBRIDGE | 4036 | — | — |
| 508-345 | BROCKTON | 6889 | — | — |
| 508-346 | FRANKLIN | 7135 | — | Yes |
| 508-347 | STURBRIDGE | 9102 | — | — |
| 508-348 | CHATHAM | 318J | — | Yes |
| 508-349 | WELLFLEET | 9102 | — | Yes |
| 508-350 | EBRIDGEWTR | 9102 | — | Yes |
| 508-351 | NORTHBORO | 9102 | — | Yes |
| 508-352 | WORCESTER | 6083 | — | — |
| 508-353 | WORCESTER | 4036 | — | — |
| 508-354 | FRAMINGHAM | 9102 | — | — |
| 508-355 | MARION | 7229 | — | Yes |
| 508-356 | CATAUMET | 829J | — | Yes |
| 508-357 | MARLBORO | 9102 | — | Yes |
| 508-358 | WAYLAND | 9102 | — | — |
| 508-359 | MEDFIELD | 9102 | — | Yes |
| 508-360 | HYANNIS | 6889 | — | Yes |
| 508-361 | FRAMINGHAM | 4036 | — | — |
| 508-362 | BARNSTABLE | 9102 | — | — |
| 508-363 | WORCESTER | 9102 | — | — |
| 508-364 | BARNSTABLE | 4036 | — | — |
| 508-365 | WORCESTER | 4018 | — | Yes |
| 508-366 | WESTBORO | 9102 | — | — |
| 508-367 | BARNSTABLE | 4036 | — | — |
| 508-368 | WORCESTER | 9102 | — | — |
| 508-369 | MANSFIELD | 6889 | — | Yes |
| 508-370 | FRAMINGHAM | 9102 | — | Yes |
| 508-371 | FRAMINGHAM | 4018 | — | Yes |
| 508-372 | WHITINSVL | 829J | 2001-03-06 | Yes |
| 508-373 | WORCESTER | 829J | — | Yes |
| 508-374 | NANTUCKET | 7229 | — | Yes |
| 508-375 | BARNSTABLE | 9102 | — | Yes |
| 508-376 | MILLIS | 9102 | — | Yes |
| 508-377 | MILFORD | 4018 | — | Yes |
| 508-378 | EBRIDGEWTR | 9102 | — | Yes |
| 508-379 | NO SWANSEA | 9102 | — | Yes |
| 508-380 | FRAMINGHAM | 6387 | — | — |
| 508-381 | MILFORD | 318J | — | Yes |
| 508-382 | MARLBORO | 7135 | — | Yes |
| 508-383 | FRAMINGHAM | 9102 | — | Yes |
| 508-384 | WRENTHAM | 9102 | — | — |
| 508-385 | DENNIS | 9102 | — | — |
| 508-386 | TAUNTON | 318J | — | Yes |
| 508-387 | FRAMINGHAM | 9102 | — | Yes |
| 508-388 | FALMOUTH | 892D | — | Yes |
| 508-389 | WESTBORO | 9102 | — | Yes |
| 508-390 | FRAMINGHAM | 9102 | — | — |
| 508-391 | FRAMINGHAM | 9102 | — | — |
| 508-392 | CATAUMET | 7619 | — | Yes |
| 508-393 | NORTHBORO | 9102 | — | — |
| 508-394 | DENNIS | 9102 | — | — |
| 508-395 | FRAMINGHAM | 4036 | — | — |
| 508-396 | FRAMINGHAM | 9102 | — | — |
| 508-397 | NATICK | 6387 | — | — |
| 508-398 | DENNIS | 9102 | — | — |
| 508-399 | SOUTHGATE | 9102 | — | 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.