TC SYSTEMS, INC.
41 prefixes in 617 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 617-217 | BOSTON | 7135 | — | Yes |
| 617-218 | CAMBRIDGE | 7135 | — | Yes |
| 617-239 | BOSTON | 7135 | — | Yes |
| 617-250 | CAMBRIDGE | 7135 | — | Yes |
| 617-300 | CAMBRIDGE | 7135 | — | Yes |
| 617-316 | BOSTON | 7135 | — | — |
| 617-378 | BOSTON | 7135 | — | Yes |
| 617-385 | BOSTON | 7135 | — | — |
| 617-386 | CAMBRIDGE | 7135 | 2001-12-15 | Yes |
| 617-392 | BOSTON | 7135 | — | — |
| 617-396 | BROOKLINE | 7135 | — | Yes |
| 617-397 | CAMBRIDGE | 7135 | — | Yes |
| 617-406 | BOSTON | 7135 | — | Yes |
| 617-431 | NEWTON | 7135 | — | Yes |
| 617-433 | MILTON | 7135 | — | Yes |
| 617-454 | NEWTON | 7135 | — | Yes |
| 617-476 | BOSTON | 7135 | — | — |
| 617-487 | BROOKLINE | 7135 | — | Yes |
| 617-488 | BOSTON | 7135 | — | Yes |
| 617-528 | CAMBRIDGE | 7135 | — | Yes |
| 617-530 | BOSTON | 7135 | — | Yes |
| 617-563 | BOSTON | 7135 | — | — |
| 617-598 | BOSTON | 7135 | — | — |
| 617-612 | WATERTOWN | 7135 | — | Yes |
| 617-613 | CAMBRIDGE | 7135 | — | — |
| 617-616 | SOMERVILLE | 7135 | — | Yes |
| 617-646 | BOSTON | 7135 | — | Yes |
| 617-663 | NEWTON | 7135 | — | Yes |
| 617-672 | BOSTON | 7135 | 2008-04-24 | Yes |
| 617-691 | QUINCY | 7135 | — | Yes |
| 617-692 | BOSTON | 7135 | — | Yes |
| 617-717 | BOSTON | 7135 | — | Yes |
| 617-747 | BOSTON | 7135 | — | — |
| 617-766 | SO BOSTON | 7135 | — | Yes |
| 617-793 | QUINCY | 7135 | — | Yes |
| 617-824 | BOSTON | 7135 | — | Yes |
| 617-850 | BOSTON | 7135 | — | Yes |
| 617-880 | BOSTON | 7135 | — | Yes |
| 617-912 | BOSTON | 7135 | — | — |
| 617-932 | BELMONT | 7135 | — | Yes |
| 617-942 | JAMAICA PL | 7135 | — | 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.