All assignees
570 prefixes in 586 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 586-415 | ROSEVILLE | 9323 | — | Yes |
| 586-416 | MT CLEMENS | 9323 | — | Yes |
| 586-418 | WARREN | 9748 | — | — |
| 586-419 | MT CLEMENS | 6003 | — | — |
| 586-420 | ROSEVILLE | 5562 | — | Yes |
| 586-421 | MT CLEMENS | 9323 | — | Yes |
| 586-422 | ARMADA | 6534 | 2017-08-17 | Yes |
| 586-424 | MT CLEMENS | 6003 | 2013-01-24 | Yes |
| 586-427 | CENTERLINE | 9323 | — | — |
| 586-428 | MT CLEMENS | 6003 | 2013-09-26 | Yes |
| 586-429 | WARREN | 6003 | 2015-09-09 | Yes |
| 586-430 | RICHMOND | 770E | — | Yes |
| 586-431 | WARREN | 6534 | — | Yes |
| 586-433 | MT CLEMENS | 6003 | 2015-06-10 | Yes |
| 586-434 | WARREN | 516C | 2014-11-05 | Yes |
| 586-435 | ROSEVILLE | 6120 | — | Yes |
| 586-436 | WARREN | 6534 | — | Yes |
| 586-438 | WARREN | 6534 | — | Yes |
| 586-439 | ROSEVILLE | 7279 | — | Yes |
| 586-441 | ROSEVILLE | 6003 | 2008-08-26 | Yes |
| 586-443 | ROSEVILLE | 9323 | — | Yes |
| 586-444 | WARREN | 6003 | 2015-01-30 | Yes |
| 586-445 | ROSEVILLE | 9323 | — | — |
| 586-446 | WARREN | 9323 | — | — |
| 586-447 | ROSEVILLE | 9323 | — | Yes |
| 586-448 | MT CLEMENS | 6003 | 2016-01-14 | Yes |
| 586-449 | WARREN | 6003 | 2016-02-10 | Yes |
| 586-450 | MT CLEMENS | 9748 | — | — |
| 586-451 | ROSEVILLE | 9748 | — | — |
| 586-453 | ROMEO | 2964 | 2001-06-18 | Yes |
| 586-455 | ARMADA | 2964 | 2025-02-28 | Yes |
| 586-457 | WARREN | 6534 | — | Yes |
| 586-459 | CENTERLINE | 991E | 2015-02-11 | Yes |
| 586-460 | ARMADA | 933G | 2014-05-30 | Yes |
| 586-461 | MT CLEMENS | 7279 | — | Yes |
| 586-463 | MT CLEMENS | 9323 | — | — |
| 586-464 | MT CLEMENS | 829J | — | Yes |
| 586-465 | MT CLEMENS | 9323 | — | — |
| 586-466 | MT CLEMENS | 9323 | — | — |
| 586-467 | CENTERLINE | 7279 | — | Yes |
| 586-468 | MT CLEMENS | 9323 | — | — |
| 586-469 | MT CLEMENS | 9323 | — | — |
| 586-470 | WARREN | 6630 | — | — |
| 586-473 | ARMADA | 770E | — | Yes |
| 586-474 | WARREN | 2964 | 2015-10-09 | Yes |
| 586-475 | MT CLEMENS | 6003 | 2014-06-26 | Yes |
| 586-477 | MT CLEMENS | 6120 | — | Yes |
| 586-480 | WARREN | 6534 | — | Yes |
| 586-481 | WARREN | 6534 | — | Yes |
| 586-482 | WARREN | 6534 | — | Yes |
| 586-483 | MT CLEMENS | 6003 | 2016-02-26 | Yes |
| 586-484 | MT CLEMENS | 6003 | — | — |
| 586-485 | MT CLEMENS | 9748 | — | — |
| 586-486 | CENTERLINE | 6120 | — | Yes |
| 586-487 | WARREN | 6003 | 2015-06-10 | Yes |
| 586-488 | UTICA | 318J | 2015-03-26 | Yes |
| 586-489 | WARREN | 2964 | — | — |
| 586-491 | ROSEVILLE | 5562 | — | Yes |
| 586-492 | CENTERLINE | 9323 | — | — |
| 586-493 | MT CLEMENS | 9323 | — | — |
| 586-494 | MT CLEMENS | 6003 | 2013-08-28 | Yes |
| 586-495 | WARREN | 6534 | — | Yes |
| 586-496 | ROSEVILLE | 2964 | 2017-12-08 | Yes |
| 586-497 | CENTERLINE | 9323 | — | — |
| 586-498 | ROSEVILLE | 9323 | — | Yes |
| 586-499 | MT CLEMENS | 6003 | 2015-01-13 | Yes |
| 586-500 | NEWBALTIMR | 543C | 2019-10-10 | Yes |
| 586-501 | CENTERLINE | 6120 | — | Yes |
| 586-504 | WARREN | 6534 | — | Yes |
| 586-505 | MT CLEMENS | 6003 | 2015-06-10 | Yes |
| 586-506 | WARREN | 6534 | — | Yes |
| 586-507 | WARREN | 9748 | — | — |
| 586-510 | CENTERLINE | 6120 | — | Yes |
| 586-511 | XXXXXXXXXX | MULT | — | — |
| 586-514 | MT CLEMENS | 6003 | 2014-11-25 | Yes |
| 586-515 | MT CLEMENS | 6003 | 2013-01-24 | Yes |
| 586-517 | — | — | ||
| 586-519 | CENTERLINE | 991E | 2017-07-20 | Yes |
| 586-522 | MT CLEMENS | 2964 | 2013-06-14 | Yes |
| 586-524 | WARREN | 2964 | 2002-06-21 | Yes |
| 586-525 | ARMADA | 5562 | 2018-10-01 | Yes |
| 586-527 | MT CLEMENS | 6003 | 2016-02-26 | Yes |
| 586-529 | WARREN | 6630 | — | — |
| 586-530 | MT CLEMENS | 6534 | — | — |
| 586-531 | ROMEO | 2964 | — | Yes |
| 586-532 | UTICA | 9323 | — | — |
| 586-533 | ROSEVILLE | 6003 | 2010-11-10 | Yes |
| 586-536 | WARREN | 6534 | — | Yes |
| 586-539 | MT CLEMENS | 6003 | 2015-08-26 | Yes |
| 586-540 | ROMEO | 6120 | — | Yes |
| 586-541 | ROSEVILLE | 829J | — | Yes |
| 586-544 | UTICA | 543C | 2021-01-06 | Yes |
| 586-545 | MT CLEMENS | 6003 | 2015-08-27 | Yes |
| 586-549 | MT CLEMENS | 6534 | 2001-12-28 | — |
| 586-550 | WARREN | 6003 | 2016-02-26 | Yes |
| 586-551 | MT CLEMENS | 2964 | 2016-11-15 | Yes |
| 586-552 | ROSEVILLE | 9323 | — | Yes |
| 586-553 | WARREN | 6534 | — | Yes |
| 586-554 | WARREN | 6534 | — | Yes |
| 586-555 | DIR ASST | MULT | — | — |
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.