SOUTHERN NEW ENGLAND TELCO DBA FRONTIER COMM OF CT
338 prefixes in 203 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 203-385 | BRIDGEPORT | 9147 | — | Yes |
| 203-386 | BRIDGEPORT | 9147 | — | — |
| 203-387 | NEW HAVEN | 9147 | — | — |
| 203-389 | NEW HAVEN | 9147 | — | — |
| 203-392 | NEW HAVEN | 9147 | — | Yes |
| 203-393 | NEW HAVEN | 9147 | — | Yes |
| 203-394 | BRIDGEPORT | 9147 | — | Yes |
| 203-396 | BRIDGEPORT | 9147 | — | — |
| 203-397 | NEW HAVEN | 9147 | — | Yes |
| 203-401 | NEW HAVEN | 9147 | — | Yes |
| 203-402 | HUNTINGTON | 9147 | — | Yes |
| 203-406 | STAMFORD | 9147 | — | Yes |
| 203-407 | NEW HAVEN | 9147 | — | Yes |
| 203-416 | BRIDGEPORT | 9147 | — | Yes |
| 203-419 | WATERBURY | 9147 | — | Yes |
| 203-420 | MERIDEN | 9147 | — | — |
| 203-421 | MADISON | 9147 | — | Yes |
| 203-425 | STAMFORD | 9147 | — | — |
| 203-426 | NEWTOWN | 9147 | — | — |
| 203-431 | RIDGEFIELD | 9147 | — | — |
| 203-436 | NEW HAVEN | 9147 | — | — |
| 203-438 | RIDGEFIELD | 9147 | — | — |
| 203-445 | TRUMBULL | 9147 | — | Yes |
| 203-452 | TRUMBULL | 9147 | — | — |
| 203-453 | GUILFORD | 9147 | — | — |
| 203-454 | WESTPORT | 9147 | — | — |
| 203-457 | GUILFORD | 9147 | — | Yes |
| 203-458 | GUILFORD | 9147 | — | — |
| 203-459 | TRUMBULL | 9147 | — | — |
| 203-461 | STAMFORD | 9147 | — | Yes |
| 203-462 | STAMFORD | 9147 | — | — |
| 203-465 | WATERBURY | 9147 | — | Yes |
| 203-466 | NEW HAVEN | 9147 | — | Yes |
| 203-467 | NEW HAVEN | 9147 | — | — |
| 203-468 | NEW HAVEN | 9147 | — | — |
| 203-469 | NEW HAVEN | 9147 | — | — |
| 203-471 | XXXXXXXXXX | 9147 | — | — |
| 203-472 | XXXXXXXXXX | 9147 | — | — |
| 203-473 | XXXXXXXXXX | 9147 | — | — |
| 203-474 | XXXXXXXXXX | 9147 | — | — |
| 203-476 | XXXXXXXXXX | 9147 | — | — |
| 203-478 | XXXXXXXXXX | 9147 | — | — |
| 203-479 | NEW HAVEN | 9147 | — | Yes |
| 203-481 | BRANFORD | 9147 | — | — |
| 203-483 | BRANFORD | 9147 | — | — |
| 203-484 | BRANFORD | 9147 | — | Yes |
| 203-486 | WOODBURY | 9147 | — | Yes |
| 203-488 | BRANFORD | 9147 | — | — |
| 203-492 | NEW HAVEN | 9147 | — | Yes |
| 203-495 | NEW HAVEN | 9147 | — | — |
| 203-497 | NEW HAVEN | 9147 | — | Yes |
| 203-498 | NEW HAVEN | 9147 | — | — |
| 203-499 | NEW HAVEN | 9147 | — | Yes |
| 203-502 | BRIDGEPORT | 9147 | — | Yes |
| 203-503 | NEW HAVEN | 9147 | — | Yes |
| 203-527 | WATERBURY | 9147 | — | Yes |
| 203-534 | BRIDGEPORT | 9147 | — | Yes |
| 203-539 | STAMFORD | 9147 | — | Yes |
| 203-541 | STAMFORD | 9147 | — | Yes |
| 203-544 | GEORGETOWN | 9147 | — | Yes |
| 203-553 | NEW HAVEN | 9147 | — | Yes |
| 203-562 | NEW HAVEN | 9147 | — | — |
| 203-563 | WILTON | 9147 | — | Yes |
| 203-573 | WATERBURY | 9147 | — | — |
| 203-574 | WATERBURY | 9147 | — | — |
| 203-575 | WATERBURY | 9147 | — | — |
| 203-576 | BRIDGEPORT | 9147 | — | — |
| 203-577 | WATERBURY | 9147 | — | Yes |
| 203-578 | WATERBURY | 9147 | — | Yes |
| 203-579 | BRIDGEPORT | 9147 | — | — |
| 203-581 | BRIDGEPORT | 9147 | — | Yes |
| 203-582 | NEW HAVEN | 9147 | — | — |
| 203-585 | STAMFORD | 9147 | — | Yes |
| 203-591 | WATERBURY | 9147 | — | — |
| 203-595 | STAMFORD | 9147 | — | Yes |
| 203-596 | WATERBURY | 9147 | — | — |
| 203-597 | WATERBURY | 9147 | — | Yes |
| 203-598 | WATERBURY | 9147 | — | Yes |
| 203-602 | STAMFORD | 9147 | — | Yes |
| 203-603 | NEW HAVEN | 9147 | — | — |
| 203-609 | STAMFORD | 9147 | — | Yes |
| 203-614 | STAMFORD | 9147 | — | Yes |
| 203-615 | BRIDGEPORT | 9147 | — | Yes |
| 203-619 | NEW HAVEN | 9147 | — | Yes |
| 203-624 | NEW HAVEN | 9147 | — | — |
| 203-630 | MERIDEN | 9147 | — | — |
| 203-634 | MERIDEN | 9147 | — | — |
| 203-637 | OLDGRNWICH | 9147 | — | — |
| 203-639 | MERIDEN | 9147 | — | — |
| 203-654 | NEW HAVEN | 9147 | — | Yes |
| 203-655 | DARIEN | 9147 | — | — |
| 203-656 | DARIEN | 9147 | — | — |
| 203-662 | DARIEN | 9147 | — | — |
| 203-674 | STAMFORD | 9147 | — | Yes |
| 203-677 | WALLINGFD | 9147 | — | Yes |
| 203-679 | WALLINGFD | 9147 | — | Yes |
| 203-680 | NEW HAVEN | 9147 | 2012-10-31 | Yes |
| 203-686 | MERIDEN | 9147 | — | — |
| 203-688 | NEW HAVEN | 9147 | — | — |
| 203-691 | NEW HAVEN | 9147 | — | 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.