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 |
|---|---|---|---|---|
| 203-205 | DANBURY | 9147 | — | Yes |
| 203-207 | DANBURY | 9147 | — | Yes |
| 203-221 | WESTPORT | 9147 | — | — |
| 203-222 | WESTPORT | 9147 | — | — |
| 203-224 | BRIDGEPORT | 9147 | — | Yes |
| 203-225 | HUNTINGTON | 9147 | — | — |
| 203-226 | WESTPORT | 9147 | — | — |
| 203-227 | WESTPORT | 9147 | — | — |
| 203-229 | NORWALK | 9147 | — | — |
| 203-230 | NEW HAVEN | 9147 | — | — |
| 203-234 | NEW HAVEN | 9147 | — | — |
| 203-235 | MERIDEN | 9147 | — | — |
| 203-236 | WATERBURY | 9147 | — | — |
| 203-237 | MERIDEN | 9147 | — | — |
| 203-238 | MERIDEN | 9147 | — | — |
| 203-239 | NEW HAVEN | 9147 | — | — |
| 203-245 | MADISON | 9147 | — | — |
| 203-248 | NEW HAVEN | 9147 | — | — |
| 203-250 | CHESHIRE | 9147 | — | — |
| 203-251 | STAMFORD | 9147 | — | — |
| 203-254 | FAIRFIELD | 9147 | — | — |
| 203-255 | FAIRFIELD | 9147 | — | — |
| 203-256 | FAIRFIELD | 9147 | — | — |
| 203-259 | FAIRFIELD | 9147 | — | — |
| 203-261 | TRUMBULL | 9147 | — | — |
| 203-262 | WOODBURY | 9147 | — | Yes |
| 203-263 | WOODBURY | 9147 | — | Yes |
| 203-264 | WOODBURY | 9147 | — | — |
| 203-265 | WALLINGFD | 9147 | — | — |
| 203-266 | WOODBURY | 9147 | — | Yes |
| 203-267 | WOODBURY | 9147 | — | Yes |
| 203-268 | TRUMBULL | 9147 | — | — |
| 203-269 | WALLINGFD | 9147 | — | — |
| 203-270 | NEWTOWN | 9147 | — | — |
| 203-271 | CHESHIRE | 9147 | — | — |
| 203-272 | CHESHIRE | 9147 | — | — |
| 203-275 | BRIDGEPORT | 9147 | — | Yes |
| 203-281 | NEW HAVEN | 9147 | — | — |
| 203-284 | WALLINGFD | 9147 | — | — |
| 203-287 | NEW HAVEN | 9147 | — | — |
| 203-288 | NEW HAVEN | 9147 | — | — |
| 203-291 | WESTPORT | 9147 | — | Yes |
| 203-294 | WALLINGFD | 9147 | — | — |
| 203-299 | NORWALK | 9147 | — | Yes |
| 203-301 | MILFORD | 9147 | — | Yes |
| 203-312 | DANBURY | 9147 | — | Yes |
| 203-315 | BRANFORD | 9147 | — | — |
| 203-316 | STAMFORD | 9147 | — | — |
| 203-317 | MERIDEN | 9147 | — | Yes |
| 203-318 | MADISON | 9147 | — | Yes |
| 203-319 | FAIRFIELD | 9147 | — | — |
| 203-321 | STAMFORD | 9147 | — | Yes |
| 203-322 | STAMFORD | 9147 | — | — |
| 203-323 | STAMFORD | 9147 | — | — |
| 203-324 | STAMFORD | 9147 | — | — |
| 203-325 | STAMFORD | 9147 | — | — |
| 203-326 | STAMFORD | 9147 | — | Yes |
| 203-327 | STAMFORD | 9147 | — | Yes |
| 203-328 | STAMFORD | 9147 | — | — |
| 203-329 | STAMFORD | 9147 | — | — |
| 203-330 | BRIDGEPORT | 9147 | — | — |
| 203-331 | BRIDGEPORT | 9147 | — | Yes |
| 203-332 | BRIDGEPORT | 9147 | — | — |
| 203-333 | BRIDGEPORT | 9147 | — | — |
| 203-334 | BRIDGEPORT | 9147 | — | — |
| 203-335 | BRIDGEPORT | 9147 | — | — |
| 203-336 | BRIDGEPORT | 9147 | — | — |
| 203-337 | BRIDGEPORT | 9147 | — | — |
| 203-338 | BRIDGEPORT | 9147 | — | Yes |
| 203-339 | BRIDGEPORT | 9147 | — | Yes |
| 203-341 | WESTPORT | 9147 | — | — |
| 203-346 | WATERBURY | 9147 | — | Yes |
| 203-348 | STAMFORD | 9147 | — | — |
| 203-351 | STAMFORD | 9147 | — | — |
| 203-352 | STAMFORD | 9147 | — | — |
| 203-353 | STAMFORD | 9147 | — | — |
| 203-356 | STAMFORD | 9147 | — | Yes |
| 203-357 | STAMFORD | 9147 | — | Yes |
| 203-358 | STAMFORD | 9147 | — | Yes |
| 203-359 | STAMFORD | 9147 | — | — |
| 203-362 | BRIDGEPORT | 9147 | — | Yes |
| 203-363 | STAMFORD | 9147 | — | Yes |
| 203-364 | NEWTOWN | 9147 | — | Yes |
| 203-365 | BRIDGEPORT | 9147 | — | — |
| 203-366 | BRIDGEPORT | 9147 | — | — |
| 203-367 | BRIDGEPORT | 9147 | — | — |
| 203-368 | BRIDGEPORT | 9147 | — | Yes |
| 203-371 | BRIDGEPORT | 9147 | — | — |
| 203-372 | BRIDGEPORT | 9147 | — | — |
| 203-373 | BRIDGEPORT | 9147 | — | — |
| 203-374 | BRIDGEPORT | 9147 | — | — |
| 203-375 | BRIDGEPORT | 9147 | — | — |
| 203-377 | BRIDGEPORT | 9147 | — | — |
| 203-378 | BRIDGEPORT | 9147 | — | — |
| 203-379 | MERIDEN | 9147 | — | Yes |
| 203-380 | BRIDGEPORT | 9147 | — | — |
| 203-381 | BRIDGEPORT | 9147 | — | — |
| 203-382 | BRIDGEPORT | 9147 | — | Yes |
| 203-383 | BRIDGEPORT | 9147 | — | Yes |
| 203-384 | BRIDGEPORT | 9147 | — | — |
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.