All assignees
800 prefixes in 617 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 617-500 | CAMBRIDGE | 4018 | — | Yes |
| 617-501 | SOMERVILLE | 5562 | — | Yes |
| 617-502 | BOSTON | 829J | — | Yes |
| 617-503 | CAMBRIDGE | 9102 | — | Yes |
| 617-504 | BOSTON | 5562 | — | Yes |
| 617-505 | BROOKLINE | 4018 | — | Yes |
| 617-506 | DORCHESTER | 829J | — | Yes |
| 617-507 | BOSTON | 7229 | — | Yes |
| 617-508 | XXXXXXXXXX | MULT | — | — |
| 617-509 | QUINCY | 9102 | — | — |
| 617-510 | BOSTON | 4036 | — | — |
| 617-511 | XXXXXXXXXX | MULT | — | — |
| 617-512 | BOSTON | 6387 | — | — |
| 617-513 | BOSTON | 4036 | — | — |
| 617-514 | DORCHESTER | 7229 | — | Yes |
| 617-515 | BOSTON | 4036 | — | — |
| 617-516 | ROXBURY | 7229 | — | Yes |
| 617-517 | BOSTON | 4018 | — | Yes |
| 617-518 | CHARLESTN | 892D | 2021-07-20 | Yes |
| 617-519 | BOSTON | 9102 | — | Yes |
| 617-520 | CAMBRIDGE | 9102 | — | Yes |
| 617-521 | BOSTON | 9102 | — | — |
| 617-522 | JAMAICA PL | 9102 | — | — |
| 617-523 | BOSTON | 9102 | — | — |
| 617-524 | JAMAICA PL | 9102 | — | — |
| 617-525 | BROOKLINE | 9102 | — | — |
| 617-526 | BOSTON | 9102 | — | — |
| 617-527 | NEWTON | 9102 | — | — |
| 617-528 | CAMBRIDGE | 7135 | — | Yes |
| 617-529 | SAUGUS | 6387 | — | — |
| 617-530 | BOSTON | 7135 | — | Yes |
| 617-531 | BOSTON | 7229 | — | — |
| 617-532 | BOSTON | 829J | — | — |
| 617-533 | DORCHESTER | 9102 | — | Yes |
| 617-534 | BOSTON | 9102 | — | — |
| 617-535 | BOSTON | 7229 | — | — |
| 617-536 | BOSTON | 9102 | — | — |
| 617-537 | QUINCY | 9102 | — | — |
| 617-538 | WALTHAM | 4036 | — | — |
| 617-539 | WINTHROP | 9102 | — | Yes |
| 617-540 | CAMBRIDGE | 9102 | — | Yes |
| 617-541 | ROXBURY | 9102 | — | — |
| 617-542 | BOSTON | 9102 | — | — |
| 617-543 | BOSTON | 4036 | — | — |
| 617-544 | EVERETT | 829J | 2001-02-22 | Yes |
| 617-545 | EVERETT | 990E | — | Yes |
| 617-546 | NEWTON | 990E | — | Yes |
| 617-547 | CAMBRIDGE | 9102 | — | — |
| 617-548 | SAUGUS | 6387 | — | — |
| 617-549 | BOSTON | 6387 | — | — |
| 617-550 | — | — | ||
| 617-551 | CAMBRIDGE | 9102 | — | — |
| 617-552 | NEWTON | 9102 | — | — |
| 617-553 | JAMAICA PL | 7619 | — | Yes |
| 617-554 | XXXXXXXXXX | 9102 | — | — |
| 617-555 | DIR ASST | MULT | — | — |
| 617-556 | BOSTON | 9102 | — | — |
| 617-557 | BOSTON | 9102 | — | — |
| 617-558 | NEWTON | 9102 | — | — |
| 617-559 | NEWTON | 9102 | — | — |
| 617-560 | BRIGHTON | 9102 | — | Yes |
| 617-561 | EASTBOSTON | 9102 | — | — |
| 617-562 | BRIGHTON | 9102 | — | Yes |
| 617-563 | BOSTON | 7135 | — | — |
| 617-564 | NEWTON | 829J | — | Yes |
| 617-565 | BOSTON | 9102 | — | — |
| 617-566 | BROOKLINE | 9102 | — | — |
| 617-567 | EASTBOSTON | 9102 | — | — |
| 617-568 | EASTBOSTON | 9102 | — | — |
| 617-569 | EASTBOSTON | 9102 | — | — |
| 617-570 | BOSTON | 9102 | — | — |
| 617-571 | BOSTON | 6387 | — | — |
| 617-572 | BOSTON | 9102 | — | — |
| 617-573 | BOSTON | 9102 | — | Yes |
| 617-574 | BOSTON | 9102 | — | — |
| 617-575 | CAMBRIDGE | 9102 | — | Yes |
| 617-576 | CAMBRIDGE | 9102 | — | — |
| 617-577 | CAMBRIDGE | 9102 | — | — |
| 617-578 | BOSTON | 9102 | — | — |
| 617-579 | BOSTON | 9102 | — | Yes |
| 617-580 | CHARLESTN | 7229 | — | Yes |
| 617-581 | NEWTON | 829J | — | Yes |
| 617-582 | BROOKLINE | 9102 | — | Yes |
| 617-583 | CAMBRIDGE | 4018 | — | Yes |
| 617-584 | NEWTON | 4036 | — | — |
| 617-585 | BOSTON | 9102 | — | — |
| 617-586 | BRIGHTON | 990E | — | Yes |
| 617-587 | BOSTON | 9102 | — | — |
| 617-588 | CAMBRIDGE | 7229 | — | — |
| 617-589 | BOSTON | 9102 | — | Yes |
| 617-590 | BOSTON | 5562 | — | Yes |
| 617-591 | SOMERVILLE | 9102 | — | Yes |
| 617-592 | BOSTON | 5562 | — | Yes |
| 617-593 | BOSTON | 5562 | — | Yes |
| 617-594 | BOSTON | 5562 | — | Yes |
| 617-595 | BOSTON | 6387 | 2005-03-07 | Yes |
| 617-596 | SO BOSTON | 5562 | — | Yes |
| 617-597 | NEWTON | 7229 | — | Yes |
| 617-598 | BOSTON | 7135 | — | — |
| 617-599 | CAMBRIDGE | 9102 | 2001-02-28 | 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.