NumberResearchRecent thousands-block assignments
2 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026
Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.
Most active assignees, last 30 days — NPA 586
New assignments by month
Sep 2026
Aug 2026
Jul 2026
Jun 2026
May 2026
Apr 2026
Mar 2026
Feb 2026
Jan 2026
Dec 2025
Nov 2025
Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2017-08-15 | 586-252-9XXX | 9000–9999 | Assigned | METROPCS, INC. | 5562 | ROSEVILLE | MI |
| 2017-08-15 | 586-784-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | ARMADA | MI |
| 2017-08-03 | 586-460-6XXX | 6000–6999 | Assigned | METROPCS, INC. | 5562 | ARMADA | MI |
| 2017-07-27 | 586-519-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | CENTERLINE | MI |
| 2017-07-27 | 586-519-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | CENTERLINE | MI |
| 2017-07-27 | 586-519-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | CENTERLINE | MI |
| 2017-07-27 | 586-519-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | CENTERLINE | MI |
| 2017-07-20 | 586-519-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - MI | 991E | CENTERLINE | MI |
| 2017-07-05 | 586-210-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - MI | 991E | NEWBALTIMR | MI |
| 2017-07-05 | 586-250-3XXX | 3000–3999 | Assigned | BANDWIDTH.COM CLEC, LLC - MI | 991E | WARREN | MI |
| 2017-07-05 | 586-696-0XXX | 0000–0999 | Assigned | METROPCS, INC. | 5562 | ROSEVILLE | MI |
| 2017-06-30 | 586-203-3XXX | 3000–3999 | Assigned | ONVOY, LLCV - MI | 543C | MT CLEMENS | MI |
| 2017-06-30 | 586-571-9XXX | 9000–9999 | Assigned | ONVOY, LLCV - MI | 543C | CENTERLINE | MI |
| 2017-06-29 | 586-305-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | MT CLEMENS | MI |
| 2017-06-29 | 586-305-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | MT CLEMENS | MI |
| 2017-06-29 | 586-551-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | MT CLEMENS | MI |
| 2017-06-29 | 586-551-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | MT CLEMENS | MI |
| 2017-06-29 | 586-676-9XXX | 9000–9999 | Assigned | GRID 4 COMMUNICATIONS, INC. - MI | 9714 | MT CLEMENS | MI |
| 2017-06-29 | 586-802-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | UTICA | MI |
| 2017-06-29 | 586-802-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | UTICA | MI |
| 2017-06-29 | 586-884-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | UTICA | MI |
| 2017-06-09 | 586-250-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 6003 | WARREN | MI |
| 2017-05-11 | 586-922-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 6003 | WARREN | MI |
| 2017-05-01 | 586-701-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - MI | 991E | NEW HAVEN | MI |
| 2017-04-10 | 586-696-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | ROSEVILLE | MI |
| 2017-04-10 | 586-696-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | ROSEVILLE | MI |
| 2017-04-10 | 586-696-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | ROSEVILLE | MI |
| 2017-04-10 | 586-696-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | ROSEVILLE | MI |
| 2017-03-30 | 586-241-8XXX | 8000–8999 | Assigned | METROPCS, INC. | 5562 | ROSEVILLE | MI |
| 2017-03-30 | 586-636-5XXX | 5000–5999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | RICHMOND | MI |
| 2017-01-26 | 586-785-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | ROMEO | MI |
| 2017-01-26 | 586-785-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | ROMEO | MI |
| 2017-01-18 | 586-460-8XXX | 8000–8999 | Assigned | METROPCS, INC. | 5562 | ARMADA | MI |
| 2017-01-17 | 586-251-3XXX | 3000–3999 | Assigned | METROPCS, INC. | 5562 | UTICA | MI |
| 2017-01-17 | 586-251-4XXX | 4000–4999 | Assigned | METROPCS, INC. | 5562 | UTICA | MI |
| 2017-01-17 | 586-251-5XXX | 5000–5999 | Assigned | METROPCS, INC. | 5562 | UTICA | MI |
| 2017-01-17 | 586-371-1XXX | 1000–1999 | Assigned | METROPCS, INC. | 5562 | WASHINGTON | MI |
| 2016-12-15 | 586-625-0XXX | 0000–0999 | Assigned | METROPCS, INC. | 5562 | ARMADA | MI |
| 2016-11-28 | 586-571-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | CENTERLINE | MI |
| 2016-11-28 | 586-571-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | CENTERLINE | MI |
| 2016-11-28 | 586-571-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | CENTERLINE | MI |
| 2016-11-16 | 586-551-8XXX | 8000–8999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | MT CLEMENS | MI |
| 2016-11-16 | 586-551-9XXX | 9000–9999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | MT CLEMENS | MI |
| 2016-11-10 | 586-305-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | MT CLEMENS | MI |
| 2016-11-10 | 586-305-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | MT CLEMENS | MI |
| 2016-11-10 | 586-305-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | MT CLEMENS | MI |
| 2016-11-10 | 586-305-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | MT CLEMENS | MI |
| 2016-11-10 | 586-305-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | MT CLEMENS | MI |
| 2016-11-10 | 586-305-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | MT CLEMENS | MI |
| 2016-11-10 | 586-305-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | MT CLEMENS | MI |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.