All assignees
570 prefixes in 586 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 586-200 | ROSEVILLE | 318J | 2013-04-10 | Yes |
| 586-201 | MT CLEMENS | 6003 | — | — |
| 586-202 | WARREN | 6534 | — | — |
| 586-203 | MT CLEMENS | 6120 | 2004-02-25 | Yes |
| 586-204 | ROSEVILLE | 318J | 2015-03-14 | Yes |
| 586-205 | MT CLEMENS | 6003 | 2013-09-26 | Yes |
| 586-206 | MT CLEMENS | 6003 | — | — |
| 586-207 | WASHINGTON | 6120 | 2001-06-18 | Yes |
| 586-208 | MT CLEMENS | 6003 | 2013-01-24 | Yes |
| 586-209 | ROSEVILLE | 5562 | 2009-03-05 | Yes |
| 586-210 | NEWBALTIMR | 460K | 2013-05-15 | Yes |
| 586-211 | XXXXXXXXXX | MULT | — | — |
| 586-212 | MT CLEMENS | 6003 | — | — |
| 586-213 | MT CLEMENS | 318J | 2014-07-01 | Yes |
| 586-214 | WARREN | 6534 | — | — |
| 586-215 | WARREN | 6534 | — | — |
| 586-216 | WARREN | 6534 | — | — |
| 586-217 | ROSEVILLE | 543C | 2014-03-27 | Yes |
| 586-218 | ROSEVILLE | 2964 | 2004-06-09 | Yes |
| 586-219 | WARREN | 6534 | — | — |
| 586-220 | MT CLEMENS | 6003 | 2014-05-16 | Yes |
| 586-221 | MT CLEMENS | 508J | 2014-03-05 | Yes |
| 586-222 | ROSEVILLE | 829J | 2005-03-14 | Yes |
| 586-223 | MT CLEMENS | 6003 | 2014-06-13 | Yes |
| 586-224 | MT CLEMENS | 2964 | 2014-10-14 | Yes |
| 586-225 | CENTERLINE | 770E | 2014-02-28 | Yes |
| 586-226 | MT CLEMENS | 9323 | — | — |
| 586-227 | MT CLEMENS | 6003 | 2014-10-09 | Yes |
| 586-228 | MT CLEMENS | 9323 | — | — |
| 586-229 | MT CLEMENS | 2964 | 2013-01-21 | Yes |
| 586-230 | WARREN | 6003 | 2015-04-03 | Yes |
| 586-231 | MT CLEMENS | 318J | 2008-06-19 | Yes |
| 586-232 | WASHINGTON | 770E | 2006-03-06 | Yes |
| 586-233 | MT CLEMENS | 6003 | 2013-01-24 | Yes |
| 586-234 | WARREN | 6003 | 2015-04-03 | Yes |
| 586-235 | MT CLEMENS | 6003 | 2014-12-12 | Yes |
| 586-236 | MT CLEMENS | 6003 | 2014-10-17 | Yes |
| 586-237 | WARREN | 2964 | 2015-06-29 | Yes |
| 586-238 | ROSEVILLE | 318J | 2014-10-24 | Yes |
| 586-239 | MT CLEMENS | 9323 | 2007-12-05 | Yes |
| 586-240 | MT CLEMENS | 6003 | 2016-02-26 | Yes |
| 586-241 | ROSEVILLE | 5562 | 2016-01-04 | Yes |
| 586-242 | MT CLEMENS | 6003 | — | — |
| 586-243 | MT CLEMENS | 6003 | — | — |
| 586-244 | NEW HAVEN | 6120 | 2006-03-07 | Yes |
| 586-245 | MT CLEMENS | 6003 | 2015-06-08 | Yes |
| 586-246 | MT CLEMENS | 6003 | — | — |
| 586-247 | UTICA | 9323 | — | — |
| 586-248 | RICHMOND | 9245 | 2006-05-23 | Yes |
| 586-249 | MT CLEMENS | 6003 | 2013-08-14 | Yes |
| 586-250 | WARREN | 543C | 2016-03-15 | Yes |
| 586-251 | UTICA | 6534 | 2016-03-31 | Yes |
| 586-252 | ROSEVILLE | 5562 | 2015-08-05 | Yes |
| 586-253 | WARREN | 6003 | 2015-09-09 | Yes |
| 586-254 | UTICA | 9323 | — | — |
| 586-255 | ROMEO | 6003 | — | — |
| 586-256 | MT CLEMENS | 6003 | — | Yes |
| 586-257 | MT CLEMENS | 543C | 2015-12-11 | Yes |
| 586-258 | WARREN | 7279 | — | Yes |
| 586-259 | MT CLEMENS | 6003 | 2015-08-27 | Yes |
| 586-260 | MT CLEMENS | 2964 | 2001-02-15 | Yes |
| 586-261 | CENTERLINE | 7279 | — | Yes |
| 586-262 | UTICA | 7279 | — | Yes |
| 586-263 | MT CLEMENS | 9323 | — | — |
| 586-264 | WARREN | 9323 | — | — |
| 586-265 | MT CLEMENS | 2964 | 2010-08-06 | Yes |
| 586-266 | MT CLEMENS | 6003 | 2015-03-20 | Yes |
| 586-267 | MT CLEMENS | 991E | 2016-04-14 | Yes |
| 586-268 | WARREN | 9323 | — | — |
| 586-269 | — | — | ||
| 586-270 | NEW HAVEN | 6120 | — | Yes |
| 586-271 | NEW HAVEN | 2964 | 2019-01-21 | Yes |
| 586-272 | WARREN | 318J | 2015-09-30 | Yes |
| 586-273 | NEWBALTIMR | 6120 | — | Yes |
| 586-274 | WARREN | 9323 | — | — |
| 586-275 | WARREN | 318J | 2007-07-10 | Yes |
| 586-276 | WARREN | 9323 | — | Yes |
| 586-277 | NEW HAVEN | 5562 | 2010-10-21 | Yes |
| 586-278 | CENTERLINE | 6534 | 2021-01-05 | Yes |
| 586-279 | ROSEVILLE | 7279 | — | Yes |
| 586-280 | MT CLEMENS | 2964 | 2021-04-28 | Yes |
| 586-281 | ROMEO | 7279 | 2002-01-16 | Yes |
| 586-282 | CENTERLINE | 9323 | 2008-11-03 | Yes |
| 586-283 | WARREN | 7279 | — | Yes |
| 586-284 | WASHINGTON | 543C | 2021-06-16 | Yes |
| 586-285 | ROSEVILLE | 9323 | — | Yes |
| 586-286 | MT CLEMENS | 9323 | — | — |
| 586-287 | MT CLEMENS | 495J | 2021-05-26 | Yes |
| 586-288 | MT CLEMENS | 6003 | 2014-06-26 | Yes |
| 586-289 | MT CLEMENS | 6003 | 2013-01-11 | Yes |
| 586-290 | RICHMOND | 2964 | 2019-01-22 | Yes |
| 586-291 | MT CLEMENS | 6003 | 2001-04-12 | — |
| 586-292 | MT CLEMENS | 6003 | — | — |
| 586-293 | ROSEVILLE | 9323 | — | — |
| 586-294 | ROSEVILLE | 9323 | — | — |
| 586-295 | MT CLEMENS | 6003 | — | — |
| 586-296 | ROSEVILLE | 9323 | — | — |
| 586-297 | CENTERLINE | 770E | 2016-01-28 | Yes |
| 586-298 | ROSEVILLE | 6003 | 2008-09-18 | Yes |
| 586-299 | MT CLEMENS | 543C | 2015-12-04 | 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.