All assignees
304 prefixes in 475 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 475-200 | HUNTINGTON | 539F | 2012-06-29 | Yes |
| 475-201 | NEW HAVEN | 5562 | 2010-02-17 | Yes |
| 475-202 | NEW HAVEN | 6624 | 2011-04-19 | Yes |
| 475-203 | WALLINGFD | 639C | 2023-06-14 | Yes |
| 475-204 | DANBURY | 6388 | 2012-12-20 | Yes |
| 475-205 | STAMFORD | 508J | 2012-08-23 | Yes |
| 475-206 | DANBURY | 6624 | 2015-02-23 | Yes |
| 475-207 | WOODBURY | 792K | 2016-02-18 | Yes |
| 475-208 | NORWALK | 4800 | 2014-12-08 | Yes |
| 475-209 | NEW HAVEN | 9147 | 2014-07-21 | Yes |
| 475-210 | BRIDGEPORT | 508J | 2016-03-30 | Yes |
| 475-211 | XXXXXXXXXX | MULT | — | — |
| 475-212 | NAUGATUCK | 539F | 2012-11-13 | Yes |
| 475-213 | STAMFORD | 6388 | 2015-05-12 | Yes |
| 475-214 | STAMFORD | 6388 | 2016-04-25 | Yes |
| 475-215 | RIDGEFIELD | 508J | 2014-06-26 | Yes |
| 475-216 | ANSONIDRBY | 6624 | 2018-12-24 | Yes |
| 475-217 | STAMFORD | 6388 | 2016-07-01 | Yes |
| 475-218 | DANBURY | 6388 | 2015-08-11 | Yes |
| 475-219 | WOLCOTT | 199F | 2015-04-16 | Yes |
| 475-220 | NEW HAVEN | 829J | 2015-09-03 | Yes |
| 475-221 | BRANFORD | 199F | 2014-08-15 | Yes |
| 475-222 | WATERBURY | 539F | 2012-11-20 | Yes |
| 475-223 | ANSONIDRBY | 6624 | 2014-05-23 | Yes |
| 475-224 | NEW HAVEN | 6388 | 2015-11-17 | Yes |
| 475-225 | BRIDGEPORT | 6388 | 2015-08-11 | Yes |
| 475-226 | STAMFORD | 6388 | 2015-11-25 | Yes |
| 475-227 | NEW HAVEN | 4036 | 2011-06-13 | Yes |
| 475-228 | ANSONIDRBY | 6388 | 2016-01-28 | Yes |
| 475-229 | STAMFORD | 6388 | 2016-07-01 | Yes |
| 475-230 | NEW HAVEN | 7143 | 2016-03-21 | Yes |
| 475-231 | TRUMBULL | 792K | 2016-08-01 | Yes |
| 475-232 | STAMFORD | 4800 | 2016-07-25 | Yes |
| 475-233 | WATERBURY | 4036 | 2016-11-08 | Yes |
| 475-234 | NEW HAVEN | 073H | 2016-12-05 | Yes |
| 475-235 | WATERBURY | 4036 | 2011-07-05 | Yes |
| 475-236 | BRIDGEPORT | 6624 | 2017-09-01 | Yes |
| 475-237 | DANBURY | 6388 | 2017-12-27 | Yes |
| 475-238 | NEW HAVEN | 6388 | 2010-05-21 | Yes |
| 475-239 | TRUMBULL | 539F | 2012-10-02 | Yes |
| 475-240 | GREENWICH | 7140 | 2015-03-11 | Yes |
| 475-241 | NEW HAVEN | 5562 | 2018-07-11 | Yes |
| 475-242 | REDDING | 539F | 2017-06-29 | Yes |
| 475-243 | ANSONIDRBY | 539F | 2013-02-08 | Yes |
| 475-244 | CHESHIRE | 639C | 2018-02-21 | Yes |
| 475-245 | NORWALK | 6388 | 2016-02-08 | Yes |
| 475-246 | NEW HAVEN | 9147 | 2014-07-22 | Yes |
| 475-247 | NEW HAVEN | 9147 | 2014-07-22 | Yes |
| 475-248 | BRIDGEPORT | 9147 | 2014-07-22 | Yes |
| 475-249 | OLDGRNWICH | 9147 | 2014-07-22 | Yes |
| 475-250 | NORWALK | 6388 | 2018-07-23 | Yes |
| 475-251 | ANSONIDRBY | 4036 | 2018-09-05 | Yes |
| 475-252 | BYRAM | 4950 | 2018-09-20 | Yes |
| 475-253 | WALLINGFD | 539F | 2018-10-24 | Yes |
| 475-254 | NEW HAVEN | 6388 | 2018-10-24 | Yes |
| 475-255 | MERIDEN | 4036 | 2018-10-05 | Yes |
| 475-256 | DANBURY | 6624 | 2018-12-24 | Yes |
| 475-257 | NORWALK | 425J | 2019-03-28 | Yes |
| 475-258 | NORWALK | 6624 | 2019-09-12 | Yes |
| 475-259 | DARIEN | 5562 | 2017-09-25 | Yes |
| 475-260 | HUNTINGTON | 624H | 2021-02-16 | Yes |
| 475-261 | NEW HAVEN | 6388 | 2019-10-25 | Yes |
| 475-262 | HUNTINGTON | 199F | 2019-05-23 | Yes |
| 475-263 | WATERBURY | 539F | 2019-10-01 | Yes |
| 475-264 | DARIEN | 639C | — | Yes |
| 475-265 | TRUMBULL | 199F | 2020-02-05 | Yes |
| 475-266 | NORWALK | 4036 | 2015-06-10 | Yes |
| 475-267 | NEW HAVEN | 4036 | 2020-03-27 | Yes |
| 475-268 | STAMFORD | 6624 | 2020-02-13 | Yes |
| 475-269 | HUNTINGTON | 639C | 2015-05-21 | Yes |
| 475-270 | WALLINGFD | 639C | 2020-05-28 | Yes |
| 475-271 | MILFORD | 639C | 2020-06-12 | Yes |
| 475-272 | FAIRFIELD | 4950 | 2020-06-03 | Yes |
| 475-273 | BRIDGEPORT | 199F | 2020-06-22 | Yes |
| 475-274 | GUILFORD | 199F | 2020-07-15 | Yes |
| 475-275 | BYRAM | 639C | 2016-02-22 | Yes |
| 475-276 | STAMFORD | 6624 | 2021-07-02 | Yes |
| 475-277 | WILTON | 508J | 2014-06-16 | Yes |
| 475-278 | GREENWICH | 4950 | 2021-02-28 | Yes |
| 475-279 | DANBURY | 6388 | 2015-11-17 | Yes |
| 475-280 | ANSONIDRBY | 6624 | 2021-03-26 | Yes |
| 475-281 | ANSONIDRBY | 6624 | 2020-12-07 | Yes |
| 475-282 | BRIDGEPORT | 199F | 2011-08-29 | Yes |
| 475-283 | NORWALK | 6388 | 2016-01-05 | Yes |
| 475-284 | BRIDGEPORT | 478J | 2020-09-18 | Yes |
| 475-285 | NAUGATUCK | 199F | 2020-07-15 | Yes |
| 475-286 | BRANFORD | 073H | 2021-06-23 | Yes |
| 475-287 | NEW HAVEN | 6624 | 2021-07-16 | Yes |
| 475-288 | NORWALK | 4800 | 2014-10-03 | Yes |
| 475-289 | DANBURY | 6388 | 2014-05-22 | Yes |
| 475-290 | DANBURY | 199F | 2021-08-31 | Yes |
| 475-291 | NORWALK | 6388 | 2021-09-27 | Yes |
| 475-292 | STAMFORD | 4036 | 2015-10-08 | Yes |
| 475-293 | WALLINGFD | 639C | 2021-06-24 | Yes |
| 475-294 | MILFORD | 639C | 2021-07-21 | Yes |
| 475-295 | WATERBURY | 4036 | 2021-04-27 | Yes |
| 475-296 | DANBURY | 6624 | 2021-09-27 | Yes |
| 475-297 | NEWTOWN | 199F | 2021-09-27 | Yes |
| 475-298 | BRIDGEPORT | 6388 | 2011-09-16 | Yes |
| 475-299 | STAMFORD | 6388 | 2015-01-20 | 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.