All assignees
570 prefixes in 586 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 586-556 | WARREN | 6534 | — | — |
| 586-557 | MT CLEMENS | 2964 | 2002-10-03 | Yes |
| 586-558 | CENTERLINE | 9323 | — | — |
| 586-559 | WARREN | 6003 | 2016-02-26 | Yes |
| 586-563 | ROSEVILLE | 9323 | — | Yes |
| 586-565 | WARREN | 6534 | — | Yes |
| 586-566 | UTICA | 9323 | — | — |
| 586-567 | WARREN | 6534 | — | Yes |
| 586-568 | WARREN | 9748 | — | — |
| 586-569 | MT CLEMENS | 7279 | — | Yes |
| 586-571 | CENTERLINE | 543C | 2016-03-23 | Yes |
| 586-573 | CENTERLINE | 9323 | — | — |
| 586-574 | CENTERLINE | 9323 | — | Yes |
| 586-575 | CENTERLINE | 9323 | — | — |
| 586-576 | CENTERLINE | 9323 | — | Yes |
| 586-577 | WARREN | 2964 | 2015-10-09 | Yes |
| 586-578 | CENTERLINE | 9323 | — | Yes |
| 586-580 | UTICA | 770E | — | Yes |
| 586-582 | CENTERLINE | 9323 | — | Yes |
| 586-585 | ROSEVILLE | 829J | — | Yes |
| 586-586 | — | — | ||
| 586-587 | MT CLEMENS | 824J | 2026-07-01 | Yes |
| 586-588 | ARMADA | 6534 | 2002-08-23 | Yes |
| 586-589 | ROMEO | 817J | — | — |
| 586-591 | NEWBALTIMR | 817J | 2002-03-27 | — |
| 586-596 | ROSEVILLE | 6003 | — | — |
| 586-598 | MT CLEMENS | 9323 | — | — |
| 586-599 | MT CLEMENS | 6003 | 2014-11-21 | Yes |
| 586-600 | CENTERLINE | 965H | 2019-12-18 | Yes |
| 586-601 | ROSEVILLE | 7279 | — | Yes |
| 586-602 | MT CLEMENS | 6003 | 2015-06-10 | Yes |
| 586-604 | WARREN | 2964 | 2001-04-20 | Yes |
| 586-606 | WARREN | 6003 | 2014-10-17 | Yes |
| 586-607 | WARREN | 6630 | — | — |
| 586-609 | WARREN | 6630 | — | — |
| 586-610 | MT CLEMENS | 2964 | 2002-08-15 | Yes |
| 586-611 | XXXXXXXXXX | MULT | — | — |
| 586-612 | MT CLEMENS | 6003 | — | — |
| 586-615 | MT CLEMENS | 2964 | — | Yes |
| 586-616 | — | — | ||
| 586-619 | CENTERLINE | 829J | — | Yes |
| 586-620 | WARREN | 817J | — | — |
| 586-622 | MT CLEMENS | 6003 | 2015-06-08 | Yes |
| 586-623 | ROMEO | 6120 | 2002-03-28 | Yes |
| 586-625 | ARMADA | 6120 | — | Yes |
| 586-627 | MT CLEMENS | 7279 | — | Yes |
| 586-628 | WARREN | 6003 | 2016-02-26 | Yes |
| 586-629 | MT CLEMENS | 6003 | 2016-01-14 | Yes |
| 586-630 | MT CLEMENS | 961J | 2002-08-23 | Yes |
| 586-634 | WARREN | 2964 | — | Yes |
| 586-636 | RICHMOND | 933G | 2014-04-17 | Yes |
| 586-638 | WARREN | 6003 | 2014-10-17 | Yes |
| 586-641 | WARREN | 6003 | 2015-07-16 | Yes |
| 586-646 | NEW HAVEN | 770E | — | Yes |
| 586-648 | NEWBALTIMR | 6120 | 2002-08-28 | Yes |
| 586-649 | MT CLEMENS | 6120 | — | Yes |
| 586-651 | ROMEO | 6003 | 2001-09-21 | — |
| 586-659 | MT CLEMENS | 6003 | 2014-05-16 | Yes |
| 586-662 | WARREN | 6534 | — | Yes |
| 586-663 | WARREN | 6534 | — | Yes |
| 586-665 | WARREN | 6534 | — | Yes |
| 586-666 | MT CLEMENS | 543C | 2017-09-22 | Yes |
| 586-668 | WARREN | 6534 | — | Yes |
| 586-675 | ROSEVILLE | 5562 | — | Yes |
| 586-676 | MT CLEMENS | 6003 | 2016-02-26 | Yes |
| 586-677 | WASHINGTON | 9323 | — | — |
| 586-681 | MT CLEMENS | 9748 | — | — |
| 586-683 | MT CLEMENS | 6003 | 2014-11-25 | Yes |
| 586-684 | NEWBALTIMR | 829J | — | Yes |
| 586-685 | UTICA | 829J | — | Yes |
| 586-689 | MT CLEMENS | 6003 | 2013-01-24 | Yes |
| 586-690 | MT CLEMENS | 6003 | — | Yes |
| 586-693 | WARREN | 6120 | — | Yes |
| 586-695 | MT CLEMENS | 6003 | 2016-02-26 | Yes |
| 586-696 | ROSEVILLE | 5562 | 2016-09-22 | Yes |
| 586-697 | WASHINGTON | 770E | — | Yes |
| 586-698 | WARREN | 829J | — | Yes |
| 586-700 | — | — | ||
| 586-701 | NEW HAVEN | 543C | 2016-03-14 | Yes |
| 586-703 | MT CLEMENS | 6003 | — | — |
| 586-704 | MT CLEMENS | 9748 | — | — |
| 586-707 | WARREN | 6534 | — | Yes |
| 586-708 | WARREN | 9748 | — | — |
| 586-709 | WARREN | 2964 | 2001-03-05 | Yes |
| 586-710 | UTICA | 817J | 2002-03-27 | — |
| 586-711 | XXXXXXXXXX | MULT | — | — |
| 586-713 | MT CLEMENS | 6003 | — | — |
| 586-715 | MT CLEMENS | 6003 | 2014-12-12 | Yes |
| 586-716 | NEWBALTIMR | 9323 | — | Yes |
| 586-717 | WARREN | 9748 | — | — |
| 586-718 | WARREN | 6534 | — | Yes |
| 586-719 | MT CLEMENS | 6003 | — | — |
| 586-722 | WARREN | 7279 | — | Yes |
| 586-723 | MT CLEMENS | 6120 | — | Yes |
| 586-725 | NEWBALTIMR | 9323 | — | — |
| 586-726 | UTICA | 9323 | — | — |
| 586-727 | RICHMOND | 0695 | — | — |
| 586-728 | WARREN | 6003 | 2015-01-30 | Yes |
| 586-731 | UTICA | 9323 | — | — |
| 586-733 | WARREN | 2964 | 2015-06-29 | 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.