All assignees
570 prefixes in 586 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 586-883 | WARREN | 318J | — | Yes |
| 586-884 | UTICA | 770E | — | Yes |
| 586-885 | MT CLEMENS | 6003 | 2014-12-12 | Yes |
| 586-888 | ROSEVILLE | 7279 | — | Yes |
| 586-894 | ROMEO | 6120 | — | Yes |
| 586-896 | WARREN | 9748 | — | — |
| 586-898 | WARREN | 9748 | — | — |
| 586-899 | ROSEVILLE | 6003 | — | — |
| 586-900 | MT CLEMENS | 145J | 2019-02-26 | Yes |
| 586-904 | WARREN | 6534 | — | — |
| 586-906 | — | — | ||
| 586-907 | MT CLEMENS | 6003 | — | — |
| 586-909 | MT CLEMENS | 6534 | — | — |
| 586-911 | XXXXXXXXXX | MULT | — | — |
| 586-912 | WARREN | 9748 | — | — |
| 586-913 | MT CLEMENS | 7279 | — | Yes |
| 586-914 | MT CLEMENS | 6003 | — | Yes |
| 586-915 | MT CLEMENS | 6003 | — | Yes |
| 586-916 | WARREN | 9748 | — | — |
| 586-917 | MT CLEMENS | 6003 | — | Yes |
| 586-918 | WARREN | 6534 | — | Yes |
| 586-920 | CENTERLINE | 770E | — | Yes |
| 586-921 | MT CLEMENS | 6003 | — | Yes |
| 586-922 | WARREN | 6003 | 2016-02-26 | Yes |
| 586-924 | MT CLEMENS | 6003 | — | Yes |
| 586-925 | MT CLEMENS | 6534 | 2001-08-17 | — |
| 586-926 | WASHINGTON | 516J | 2022-02-28 | Yes |
| 586-928 | NEW HAVEN | 6120 | — | Yes |
| 586-929 | MT CLEMENS | 6003 | — | Yes |
| 586-930 | UTICA | 7279 | — | Yes |
| 586-932 | UTICA | 6120 | — | Yes |
| 586-933 | WARREN | 6120 | — | Yes |
| 586-935 | WASHINGTON | 5562 | — | Yes |
| 586-939 | WARREN | 9323 | — | — |
| 586-940 | MT CLEMENS | 6003 | — | Yes |
| 586-942 | MT CLEMENS | 6003 | — | — |
| 586-943 | ROSEVILLE | 5562 | — | Yes |
| 586-944 | ROSEVILLE | 5562 | — | Yes |
| 586-945 | ROSEVILLE | 5562 | — | Yes |
| 586-946 | WARREN | 6534 | — | Yes |
| 586-947 | CENTERLINE | 9323 | — | — |
| 586-948 | MT CLEMENS | 9323 | — | Yes |
| 586-949 | MT CLEMENS | 9323 | — | — |
| 586-950 | — | — | ||
| 586-954 | MT CLEMENS | 9323 | — | — |
| 586-955 | WARREN | 6003 | 2015-06-10 | Yes |
| 586-958 | — | — | ||
| 586-959 | — | — | ||
| 586-960 | ROMEO | 829J | — | Yes |
| 586-961 | MT CLEMENS | 6003 | — | Yes |
| 586-974 | WARREN | 9748 | — | — |
| 586-975 | MT CLEMENS | 9748 | — | — |
| 586-976 | — | — | ||
| 586-977 | WARREN | 9323 | — | — |
| 586-978 | WARREN | 9323 | — | — |
| 586-979 | WARREN | 9323 | — | — |
| 586-980 | MT CLEMENS | 6003 | — | Yes |
| 586-981 | WARREN | 6120 | — | Yes |
| 586-983 | WARREN | 9323 | — | Yes |
| 586-985 | MT CLEMENS | 6003 | 2015-03-20 | Yes |
| 586-986 | CENTERLINE | 9323 | — | — |
| 586-988 | — | — | ||
| 586-989 | — | — | ||
| 586-991 | UTICA | 9323 | 2001-04-20 | Yes |
| 586-992 | WASHINGTON | 9323 | 2001-05-16 | Yes |
| 586-994 | WARREN | 6534 | — | Yes |
| 586-995 | WARREN | 6534 | — | Yes |
| 586-996 | WARREN | 6534 | — | — |
| 586-997 | UTICA | 9323 | — | Yes |
| 586-999 | WARREN | 543C | 2015-07-24 | 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.