All assignees
646 prefixes in 413 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 413-500 | MONROE BDG | 892D | — | Yes |
| 413-501 | SHEFFIELD | 939H | 2023-09-26 | Yes |
| 413-502 | WILLIAMSBG | 829J | — | — |
| 413-503 | WARREN | 939H | 2023-09-26 | Yes |
| 413-504 | SPRINGFLD | 7135 | — | Yes |
| 413-505 | SPRINGFLD | 671J | 2006-03-23 | Yes |
| 413-506 | HATFIELD | 939H | 2023-09-26 | Yes |
| 413-507 | SPRINGFLD | 5562 | 2016-09-21 | Yes |
| 413-508 | — | — | ||
| 413-509 | WILBRAHAM | 829J | — | Yes |
| 413-510 | HOLYOKE | 6889 | 2023-11-09 | Yes |
| 413-511 | XXXXXXXXXX | MULT | — | — |
| 413-512 | GREENFIELD | 829J | — | Yes |
| 413-513 | WILBRAHAM | 829J | — | — |
| 413-514 | HAMPDEN | 892D | 2021-03-25 | Yes |
| 413-515 | SPRINGFLD | 475J | 2023-12-13 | Yes |
| 413-516 | WESTFIELD | 616J | 2023-12-18 | Yes |
| 413-517 | NORTHAMPTN | 829J | — | Yes |
| 413-518 | — | — | ||
| 413-519 | SPRINGFLD | 6387 | — | — |
| 413-520 | HUNTINGTON | 6387 | 2023-12-18 | Yes |
| 413-521 | BRIMFIELD | 829J | — | — |
| 413-522 | GREENFIELD | 4036 | — | — |
| 413-523 | SPRINGFLD | 829J | — | Yes |
| 413-524 | SPRINGFLD | 321J | 2025-09-25 | Yes |
| 413-525 | ELONGMEDOW | 9102 | — | — |
| 413-526 | ELONGMEDOW | 9102 | — | Yes |
| 413-527 | EASTHAMPTN | 9102 | — | — |
| 413-528 | GREATBNGTN | 9102 | — | — |
| 413-529 | EASTHAMPTN | 9102 | — | Yes |
| 413-530 | HOLYOKE | 6387 | — | — |
| 413-531 | HOLYOKE | 6387 | — | — |
| 413-532 | HOLYOKE | 9102 | — | — |
| 413-533 | HOLYOKE | 9102 | — | — |
| 413-534 | HOLYOKE | 9102 | — | — |
| 413-535 | HOLYOKE | 9102 | — | Yes |
| 413-536 | HOLYOKE | 9102 | — | — |
| 413-537 | HOLYOKE | 6387 | — | — |
| 413-538 | HOLYOKE | 9102 | — | Yes |
| 413-539 | HOLYOKE | 9102 | — | Yes |
| 413-540 | HOLYOKE | 9102 | — | Yes |
| 413-541 | GREATBNGTN | 829J | — | Yes |
| 413-542 | AMHERST | 9102 | — | — |
| 413-543 | SPRINGFLD | 9102 | — | — |
| 413-544 | PALMER | 6387 | 2001-08-24 | Yes |
| 413-545 | AMHERST | 9102 | — | — |
| 413-546 | AMHERST | 9102 | — | — |
| 413-547 | LUDLOW | 9102 | — | Yes |
| 413-548 | AMHRSTFKLN | 9102 | — | Yes |
| 413-549 | AMHERST | 9102 | — | — |
| 413-550 | — | — | ||
| 413-551 | LENOX | 829J | 2001-05-21 | Yes |
| 413-552 | HOLYOKE | 9102 | — | Yes |
| 413-553 | PITTSFIELD | 829J | — | Yes |
| 413-554 | XXXXXXXXXX | 9102 | — | — |
| 413-555 | DIR ASST | MULT | — | — |
| 413-556 | CHESTER | 829J | — | — |
| 413-557 | CHICOPEE | 9102 | — | Yes |
| 413-558 | WARREN | 624H | 2020-11-04 | Yes |
| 413-559 | AMHRSTFKLN | 7135 | — | Yes |
| 413-560 | NORTHAMPTN | 6387 | 2025-04-14 | Yes |
| 413-561 | HOLYOKE | 4036 | — | Yes |
| 413-562 | WESTFIELD | 9102 | — | — |
| 413-563 | SPRINGFLD | 4036 | — | — |
| 413-564 | WESTFIELD | 9102 | — | Yes |
| 413-565 | LONGMEADOW | 9102 | — | Yes |
| 413-566 | HAMPDEN | 9102 | — | Yes |
| 413-567 | LONGMEADOW | 9102 | — | — |
| 413-568 | WESTFIELD | 9102 | — | — |
| 413-569 | SOUTHWICK | 9102 | — | Yes |
| 413-570 | NORTHAMPTN | 829J | — | Yes |
| 413-571 | WESTFIELD | 829J | 2018-03-02 | Yes |
| 413-572 | WESTFIELD | 9102 | — | — |
| 413-573 | AMHERST | 9102 | — | — |
| 413-574 | SPRINGFLD | 6387 | 2024-12-10 | Yes |
| 413-575 | HOLYOKE | 6387 | — | — |
| 413-577 | AMHERST | 9102 | — | — |
| 413-578 | PALMER | 9748 | — | — |
| 413-579 | WESTFIELD | 7135 | — | Yes |
| 413-580 | CHICOPEE | 6889 | 2024-10-31 | Yes |
| 413-581 | CHESTERFLD | 829J | — | — |
| 413-582 | NORTHAMPTN | 9102 | — | — |
| 413-583 | LUDLOW | 9102 | — | Yes |
| 413-584 | NORTHAMPTN | 9102 | — | — |
| 413-585 | NORTHAMPTN | 9102 | — | — |
| 413-586 | NORTHAMPTN | 9102 | — | — |
| 413-587 | NORTHAMPTN | 9102 | — | — |
| 413-588 | NORTHAMPTN | 7135 | — | Yes |
| 413-589 | LUDLOW | 9102 | — | Yes |
| 413-590 | PALMER | 6387 | 2025-07-11 | Yes |
| 413-591 | GREATBNGTN | 4018 | — | Yes |
| 413-592 | CHICOPEE | 9102 | — | — |
| 413-593 | CHICOPEE | 9102 | — | Yes |
| 413-594 | CHICOPEE | 9102 | — | Yes |
| 413-595 | HAMPDEN | 829J | 2001-05-21 | Yes |
| 413-596 | WILBRAHAM | 9102 | — | Yes |
| 413-597 | WILLIAMSTN | 9102 | — | Yes |
| 413-598 | CHICOPEE | 9102 | — | Yes |
| 413-599 | WILBRAHAM | 9102 | — | Yes |
| 413-600 | STOCKBDG | 892D | — | 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.