All assignees
326 prefixes in 623 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 623-200 | PHOENIX | 630E | 2015-10-27 | Yes |
| 623-201 | PHOENIX | 7229 | 2008-07-11 | Yes |
| 623-202 | PHOENIX | 6529 | 2001-02-14 | Yes |
| 623-203 | PHOENIX | 6010 | 2001-01-18 | — |
| 623-204 | PHOENIX | 6010 | 2001-03-07 | — |
| 623-205 | PHOENIX | 6010 | 2001-03-07 | — |
| 623-206 | PHOENIX | 6010 | 2001-03-07 | — |
| 623-207 | PHOENIX | 9636 | 2008-06-05 | Yes |
| 623-208 | PHOENIX | 6572 | 2008-06-03 | Yes |
| 623-209 | PHOENIX | 7175 | — | Yes |
| 623-210 | PHOENIX | 6529 | — | Yes |
| 623-211 | XXXXXXXXXX | MULT | — | — |
| 623-212 | PHOENIX | 6529 | 2023-01-11 | Yes |
| 623-213 | PHOENIX | 6529 | 2016-03-22 | Yes |
| 623-214 | PHOENIX | 9636 | — | — |
| 623-215 | PHOENIX | 829J | 2001-03-21 | Yes |
| 623-216 | PHOENIX | 5562 | 2014-09-19 | Yes |
| 623-217 | PHOENIX | 6529 | — | Yes |
| 623-218 | PHOENIX | 7229 | — | Yes |
| 623-219 | PHOENIX | 5562 | 2015-01-19 | Yes |
| 623-220 | PHOENIX | 630E | 2024-02-23 | Yes |
| 623-221 | PHOENIX | 6529 | — | Yes |
| 623-222 | PHOENIX | 9636 | 2007-03-29 | Yes |
| 623-223 | PHOENIX | 6010 | 2009-06-30 | Yes |
| 623-224 | PHOENIX | 6010 | 2009-02-13 | Yes |
| 623-225 | PHOENIX | 6010 | 2002-03-07 | Yes |
| 623-226 | PHOENIX | 5562 | 2016-03-09 | Yes |
| 623-227 | PHOENIX | 587F | 2014-11-13 | Yes |
| 623-228 | PHOENIX | 7217 | 2015-06-26 | Yes |
| 623-229 | PHOENIX | 6010 | 2001-07-17 | — |
| 623-230 | PHOENIX | 6529 | 2016-04-21 | Yes |
| 623-231 | PHOENIX | 3285 | 2018-03-29 | Yes |
| 623-232 | PHOENIX | 9636 | 2016-10-19 | Yes |
| 623-233 | PHOENIX | 6572 | 2016-10-21 | Yes |
| 623-234 | PHOENIX | 9636 | 2007-12-31 | Yes |
| 623-235 | PHOENIX | 9636 | 2016-05-10 | Yes |
| 623-236 | PHOENIX | 6572 | 2007-03-22 | Yes |
| 623-237 | PHOENIX | 6572 | 2007-06-21 | Yes |
| 623-238 | PHOENIX | 6572 | 2006-08-24 | Yes |
| 623-239 | PHOENIX | 6529 | 2007-09-07 | Yes |
| 623-240 | PHOENIX | 7229 | 2009-06-15 | Yes |
| 623-241 | PHOENIX | 6010 | 2007-02-23 | Yes |
| 623-242 | PHOENIX | 3285 | 2006-01-05 | Yes |
| 623-243 | PHOENIX | 6572 | 2007-02-05 | Yes |
| 623-244 | PHOENIX | 630E | 2018-08-24 | Yes |
| 623-245 | PHOENIX | 9636 | — | — |
| 623-246 | PHOENIX | 5562 | 2019-01-14 | Yes |
| 623-247 | PHOENIX | 9636 | — | — |
| 623-248 | PHOENIX | 9636 | 2019-02-14 | Yes |
| 623-249 | PHOENIX | 6572 | 2007-05-23 | Yes |
| 623-250 | PHOENIX | 587F | 2020-02-13 | Yes |
| 623-251 | PHOENIX | 6572 | 2007-09-05 | Yes |
| 623-252 | PHOENIX | 3285 | 2007-09-07 | Yes |
| 623-253 | PHOENIX | 3285 | 2020-01-07 | Yes |
| 623-254 | PHOENIX | 5562 | 2020-03-05 | Yes |
| 623-255 | PHOENIX | 6529 | 2007-03-16 | Yes |
| 623-256 | PHOENIX | 318J | — | Yes |
| 623-257 | PHOENIX | 587F | 2020-06-19 | Yes |
| 623-258 | PHOENIX | 6572 | 2009-09-09 | Yes |
| 623-259 | PHOENIX | 3285 | 2019-06-14 | Yes |
| 623-260 | PHOENIX | 630E | 2024-07-17 | Yes |
| 623-261 | PHOENIX | 6529 | — | Yes |
| 623-262 | PHOENIX | 6572 | 2006-01-19 | Yes |
| 623-263 | PHOENIX | 630E | 2019-12-19 | Yes |
| 623-264 | PHOENIX | 6529 | 2020-09-15 | Yes |
| 623-265 | PHOENIX | 508J | 2020-09-08 | Yes |
| 623-266 | PHOENIX | 318J | — | — |
| 623-267 | PHOENIX | 516J | 2020-11-18 | Yes |
| 623-268 | PHOENIX | 6529 | 2021-03-25 | Yes |
| 623-269 | PHOENIX | 318J | 2020-12-09 | Yes |
| 623-270 | PHOENIX | 318J | 2021-03-30 | Yes |
| 623-271 | PHOENIX | 6572 | 2006-09-27 | Yes |
| 623-272 | PHOENIX | 6529 | 2020-12-10 | Yes |
| 623-273 | PHOENIX | 6529 | 2021-07-01 | Yes |
| 623-274 | PHOENIX | 3285 | 2021-10-07 | Yes |
| 623-275 | PHOENIX | 6529 | 2021-09-14 | Yes |
| 623-276 | PHOENIX | 6529 | 2022-04-22 | Yes |
| 623-277 | PHOENIX | 6010 | 2010-07-19 | Yes |
| 623-278 | PHOENIX | 073H | 2021-10-04 | Yes |
| 623-279 | PHOENIX | 624H | 2021-11-12 | Yes |
| 623-280 | PHOENIX | 6529 | 2021-12-02 | Yes |
| 623-281 | PHOENIX | 6529 | 2022-01-13 | Yes |
| 623-282 | PHOENIX | 7229 | 2011-10-04 | Yes |
| 623-283 | PHOENIX | 630E | 2022-04-11 | Yes |
| 623-284 | PHOENIX | 6529 | 2022-02-22 | Yes |
| 623-285 | PHOENIX | 9636 | 2015-05-21 | Yes |
| 623-286 | PHOENIX | 6529 | 2022-07-14 | Yes |
| 623-287 | PHOENIX | 939H | 2022-06-14 | Yes |
| 623-288 | PHOENIX | 630E | 2022-02-22 | Yes |
| 623-289 | PHOENIX | 587F | 2018-01-17 | Yes |
| 623-290 | PHOENIX | 6529 | 2022-11-23 | Yes |
| 623-291 | PHOENIX | 732J | 2022-09-21 | Yes |
| 623-292 | PHOENIX | 5562 | 2020-09-02 | Yes |
| 623-293 | PHOENIX | 7217 | — | Yes |
| 623-294 | PHOENIX | 630E | 2022-07-15 | Yes |
| 623-295 | PHOENIX | 587F | 2011-07-22 | Yes |
| 623-296 | PHOENIX | 6529 | 2015-03-27 | Yes |
| 623-297 | PHOENIX | 6529 | — | Yes |
| 623-298 | PHOENIX | 7229 | — | Yes |
| 623-299 | PHOENIX | 7229 | 2012-05-03 | 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.