TELEPORT COMMUNICATIONS AMERICA, LLC - CT
33 prefixes in 203 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 203-204 | GUILFORD | 7143 | — | Yes |
| 203-285 | NEW HAVEN | 7143 | — | Yes |
| 203-303 | WALLINGFD | 7143 | — | Yes |
| 203-304 | NEWTOWN | 7143 | — | Yes |
| 203-349 | WESTPORT | 7143 | — | Yes |
| 203-350 | MADISON | 7143 | — | Yes |
| 203-390 | NEW HAVEN | 7143 | 2015-11-10 | Yes |
| 203-403 | RIDGEFIELD | 7143 | — | Yes |
| 203-409 | OLDGRNWICH | 7143 | — | Yes |
| 203-418 | FAIRFIELD | 7143 | — | Yes |
| 203-423 | WILTON | 7143 | — | Yes |
| 203-441 | WOLCOTT | 7143 | — | Yes |
| 203-442 | NEW CANAAN | 7143 | — | Yes |
| 203-446 | ANSONIDRBY | 7143 | — | Yes |
| 203-447 | HUNTINGTON | 7143 | — | Yes |
| 203-463 | SEYMOUR | 7143 | — | Yes |
| 203-490 | NAUGATUCK | 7143 | — | Yes |
| 203-514 | MERIDEN | 7143 | — | Yes |
| 203-523 | NORWALK | 7143 | — | Yes |
| 203-546 | DANBURY | 7143 | — | Yes |
| 203-551 | BRIDGEPORT | 7143 | — | Yes |
| 203-559 | DARIEN | 7143 | — | Yes |
| 203-586 | WOODBURY | 7143 | — | Yes |
| 203-601 | TRUMBULL | 7143 | — | Yes |
| 203-658 | STAMFORD | 7143 | — | Yes |
| 203-747 | NEW HAVEN | 7143 | — | Yes |
| 203-805 | WATERBURY | 7143 | — | Yes |
| 203-806 | CHESHIRE | 7143 | — | Yes |
| 203-871 | BRANFORD | 7143 | — | Yes |
| 203-880 | TRUMBULL | 7143 | — | Yes |
| 203-905 | STAMFORD | 7143 | — | Yes |
| 203-951 | MILFORD | 7143 | — | Yes |
| 203-974 | NEW HAVEN | 7143 | — | 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.