All assignees
639 prefixes in 517 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 517-200 | LITCHFIELD | 6534 | 2004-03-15 | Yes |
| 517-201 | LESLIE | 543C | 2016-03-08 | Yes |
| 517-202 | LANSING | 2964 | — | Yes |
| 517-203 | LANSING | 9323 | — | Yes |
| 517-204 | LANSING | 2964 | — | Yes |
| 517-205 | JACKSON | 9323 | 2014-04-17 | Yes |
| 517-206 | JACKSON | 2964 | — | Yes |
| 517-207 | ADRIAN | 817J | — | — |
| 517-208 | BRITTON | 508J | 2014-03-13 | Yes |
| 517-209 | HOLT | 991E | 2009-05-04 | Yes |
| 517-210 | POTTERVL | 543C | 2016-03-08 | Yes |
| 517-211 | XXXXXXXXXX | MULT | — | — |
| 517-212 | HILLSDALE | 6003 | 2004-04-16 | Yes |
| 517-213 | CHARLOTTE | 6120 | — | Yes |
| 517-214 | LANSING | 2964 | — | Yes |
| 517-215 | ADRIAN | 2964 | 2010-01-14 | Yes |
| 517-216 | LANSING | 425J | 2020-06-25 | Yes |
| 517-217 | CLINTON | 3459 | — | — |
| 517-218 | PORTLAND | 6534 | 2023-11-16 | Yes |
| 517-219 | FOWLERVL | 6120 | 2004-06-23 | Yes |
| 517-220 | LANSING | 508J | 2015-10-14 | Yes |
| 517-221 | HOLT | 6534 | 2016-04-12 | Yes |
| 517-222 | DANSVILLE | 7157 | 2005-09-15 | Yes |
| 517-223 | FOWLERVL | 9323 | — | — |
| 517-224 | POTTERVL | 6120 | 2004-10-20 | Yes |
| 517-225 | HOWELL | 6534 | 2015-11-16 | Yes |
| 517-226 | LANSING | 9748 | — | — |
| 517-227 | COLDWATER | 6003 | 2003-04-29 | Yes |
| 517-228 | LANSING | 6630 | — | — |
| 517-229 | LANSING | 6630 | — | — |
| 517-230 | LANSING | 6003 | — | — |
| 517-231 | CHARLOTTE | 6003 | — | — |
| 517-232 | LANSING | 6630 | — | — |
| 517-233 | EATON RPD | 7157 | 2005-03-16 | Yes |
| 517-234 | HOWELL | 6534 | 2016-11-08 | Yes |
| 517-235 | DIMONDALE | 516C | 2010-12-07 | Yes |
| 517-236 | DIMONDALE | 6003 | — | Yes |
| 517-237 | LANSING | 543C | — | Yes |
| 517-238 | COLDWTR LK | 0695 | — | Yes |
| 517-239 | DE WITT | 0695 | 2015-04-23 | Yes |
| 517-240 | JACKSON | 2964 | 2010-03-29 | Yes |
| 517-241 | LANSING | 9323 | — | — |
| 517-242 | LANSING | 6003 | — | — |
| 517-243 | LANSING | 6003 | — | — |
| 517-244 | MASON | 9323 | — | Yes |
| 517-245 | FOWLERVL | 6003 | 2015-09-17 | Yes |
| 517-246 | LANSING | 933G | 2019-08-01 | Yes |
| 517-247 | JACKSON | 770E | 2019-05-14 | Yes |
| 517-248 | — | — | ||
| 517-249 | LANSING | 6534 | 2017-03-08 | Yes |
| 517-250 | JACKSON | 6534 | — | Yes |
| 517-251 | LANSING | 9748 | — | — |
| 517-252 | ADDISON | 6534 | — | Yes |
| 517-253 | LANSING | 9323 | 2013-04-19 | Yes |
| 517-254 | FRONTIER | 4417 | — | — |
| 517-255 | LANSING | 9748 | — | — |
| 517-256 | LANSING | 6003 | — | — |
| 517-257 | JACKSON | 6003 | 2017-04-26 | Yes |
| 517-258 | HOWELL | 991E | 2012-03-12 | Yes |
| 517-259 | JACKSON | 6003 | 2025-02-25 | Yes |
| 517-260 | ADRIAN | 6003 | — | — |
| 517-261 | GRANDLEDGE | 2964 | 2020-10-20 | Yes |
| 517-262 | JACKSON | 6003 | — | — |
| 517-263 | ADRIAN | 0695 | — | — |
| 517-264 | ADRIAN | 0695 | — | — |
| 517-265 | ADRIAN | 0695 | — | — |
| 517-266 | ADRIAN | 0695 | — | — |
| 517-267 | LANSING | 9323 | — | — |
| 517-268 | HOLT | 7157 | — | Yes |
| 517-269 | — | — | ||
| 517-270 | ADRIAN | 6534 | — | Yes |
| 517-271 | NASHVILLE | 543C | 2020-10-26 | Yes |
| 517-272 | LANSING | 9323 | — | Yes |
| 517-273 | HOWELL | 770E | 2017-07-26 | Yes |
| 517-274 | SHAFTSBURG | 543C | 2021-06-25 | Yes |
| 517-275 | LANSING | 733J | 2017-03-30 | Yes |
| 517-276 | HUDSON | 543C | 2021-06-25 | Yes |
| 517-277 | DE WITT | 591C | 2004-10-27 | — |
| 517-278 | COLDWATER | 0695 | — | — |
| 517-279 | COLDWATER | 0695 | — | — |
| 517-280 | ADRIAN | 2964 | 2021-01-19 | Yes |
| 517-281 | LANSING | 6003 | — | — |
| 517-282 | LANSING | 6003 | — | — |
| 517-283 | READING | 0695 | — | Yes |
| 517-284 | LANSING | 9323 | 2011-08-11 | Yes |
| 517-285 | LANSING | 6003 | — | — |
| 517-286 | WALDRON | 0734 | — | — |
| 517-287 | NORTHADAMS | 4417 | — | — |
| 517-288 | SUNFIELD | 6534 | 2004-12-20 | Yes |
| 517-289 | LANSING | 543C | — | Yes |
| 517-290 | LANSING | 6003 | — | — |
| 517-291 | ADRIAN | 495J | 2021-03-19 | Yes |
| 517-292 | HOWELL | 770E | — | Yes |
| 517-293 | LESLIE | 543C | 2021-07-29 | Yes |
| 517-294 | FOWLERVL | 6003 | — | — |
| 517-295 | HOWELL | 991E | 2013-03-08 | Yes |
| 517-296 | MONTGOMERY | 4417 | — | Yes |
| 517-297 | HILLSDALE | 6534 | 2021-09-03 | Yes |
| 517-298 | MORENCI | 793K | — | Yes |
| 517-299 | LANSING | 991E | 2023-01-25 | 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.