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 |
|---|---|---|---|---|---|---|---|
| 2009-02-05 | 586-298-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - MI | 991E | ROSEVILLE | MI |
| 2009-02-05 | 586-330-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - MI | 991E | NEWBALTIMR | MI |
| 2009-02-05 | 586-372-8XXX | 8000–8999 | Assigned | BANDWIDTH.COM CLEC, LLC - MI | 991E | ROMEO | MI |
| 2009-02-05 | 586-738-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - MI | 991E | MT CLEMENS | MI |
| 2009-02-05 | 586-745-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - MI | 991E | WASHINGTON | MI |
| 2009-02-05 | 586-806-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - MI | 991E | CENTERLINE | MI |
| 2009-02-05 | 586-913-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - MI | 991E | MT CLEMENS | MI |
| 2009-02-05 | 586-991-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - MI | 991E | UTICA | MI |
| 2009-01-19 | 586-298-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | ROSEVILLE | MI |
| 2009-01-08 | 586-248-2XXX | 2000–2999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | RICHMOND | MI |
| 2009-01-05 | 586-231-1XXX | 1000–1999 | Assigned | ONVOY, LLCV - MI | 543C | MT CLEMENS | MI |
| 2009-01-05 | 586-231-2XXX | 2000–2999 | Assigned | ONVOY, LLCV - MI | 543C | MT CLEMENS | MI |
| 2009-01-05 | 586-231-6XXX | 6000–6999 | Assigned | ONVOY, LLCV - MI | 543C | MT CLEMENS | MI |
| 2009-01-05 | 586-231-7XXX | 7000–7999 | Assigned | ONVOY, LLCV - MI | 543C | MT CLEMENS | MI |
| 2009-01-05 | 586-646-6XXX | 6000–6999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | NEW HAVEN | MI |
| 2008-12-15 | 586-646-3XXX | 3000–3999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | NEW HAVEN | MI |
| 2008-12-08 | 586-360-0XXX | 0000–0999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | ROSEVILLE | MI |
| 2008-12-08 | 586-441-2XXX | 2000–2999 | Assigned | METROPCS, INC. | 5562 | ROSEVILLE | MI |
| 2008-12-08 | 586-447-6XXX | 6000–6999 | Assigned | METROPCS, INC. | 5562 | ROSEVILLE | MI |
| 2008-12-08 | 586-498-6XXX | 6000–6999 | Assigned | METROPCS, INC. | 5562 | ROSEVILLE | MI |
| 2008-12-08 | 586-823-2XXX | 2000–2999 | Assigned | METROPCS, INC. | 5562 | ROSEVILLE | MI |
| 2008-11-14 | 586-819-3XXX | 3000–3999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | WARREN | MI |
| 2008-11-14 | 586-819-4XXX | 4000–4999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | WARREN | MI |
| 2008-11-11 | 586-339-0XXX | 0000–0999 | Assigned | METROPCS, INC. | 5562 | NEW HAVEN | MI |
| 2008-11-03 | 586-282-0XXX | 0000–0999 | Assigned | MICHIGAN BELL TEL CO | 9323 | CENTERLINE | MI |
| 2008-11-03 | 586-282-1XXX | 1000–1999 | Assigned | MICHIGAN BELL TEL CO | 9323 | CENTERLINE | MI |
| 2008-11-03 | 586-282-2XXX | 2000–2999 | Assigned | MICHIGAN BELL TEL CO | 9323 | CENTERLINE | MI |
| 2008-11-03 | 586-282-3XXX | 3000–3999 | Assigned | MICHIGAN BELL TEL CO | 9323 | CENTERLINE | MI |
| 2008-11-03 | 586-282-4XXX | 4000–4999 | Assigned | MICHIGAN BELL TEL CO | 9323 | CENTERLINE | MI |
| 2008-11-03 | 586-282-5XXX | 5000–5999 | Assigned | MICHIGAN BELL TEL CO | 9323 | CENTERLINE | MI |
| 2008-11-03 | 586-282-6XXX | 6000–6999 | Assigned | MICHIGAN BELL TEL CO | 9323 | CENTERLINE | MI |
| 2008-11-03 | 586-282-7XXX | 7000–7999 | Assigned | MICHIGAN BELL TEL CO | 9323 | CENTERLINE | MI |
| 2008-11-03 | 586-282-8XXX | 8000–8999 | Assigned | MICHIGAN BELL TEL CO | 9323 | CENTERLINE | MI |
| 2008-11-03 | 586-282-9XXX | 9000–9999 | Assigned | MICHIGAN BELL TEL CO | 9323 | CENTERLINE | MI |
| 2008-09-29 | 586-275-4XXX | 4000–4999 | Assigned | ONVOY, LLCV - MI | 543C | WARREN | MI |
| 2008-09-29 | 586-275-5XXX | 5000–5999 | Assigned | ONVOY, LLCV - MI | 543C | WARREN | MI |
| 2008-09-29 | 586-275-6XXX | 6000–6999 | Assigned | ONVOY, LLCV - MI | 543C | WARREN | MI |
| 2008-09-29 | 586-441-3XXX | 3000–3999 | Assigned | ONVOY, LLCV - MI | 543C | ROSEVILLE | MI |
| 2008-09-29 | 586-441-4XXX | 4000–4999 | Assigned | ONVOY, LLCV - MI | 543C | ROSEVILLE | MI |
| 2008-09-29 | 586-441-5XXX | 5000–5999 | Assigned | ONVOY, LLCV - MI | 543C | ROSEVILLE | MI |
| 2008-09-29 | 586-883-8XXX | 8000–8999 | Assigned | ONVOY, LLCV - MI | 543C | WARREN | MI |
| 2008-09-18 | 586-298-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 6003 | ROSEVILLE | MI |
| 2008-09-17 | 586-275-3XXX | 3000–3999 | Assigned | FIRST COMMUNICATIONS, LLC | 460K | WARREN | MI |
| 2008-09-15 | 586-441-6XXX | 6000–6999 | Assigned | METROPCS, INC. | 5562 | ROSEVILLE | MI |
| 2008-09-10 | 586-884-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MI | 6120 | UTICA | MI |
| 2008-09-09 | 586-350-0XXX | 0000–0999 | Assigned | WOW! INTERNET, CABLE AND PHONE | 961J | ROSEVILLE | MI |
| 2008-09-05 | 586-232-4XXX | 4000–4999 | Assigned | COMCAST IP PHONE, LLC | 318J | WASHINGTON | MI |
| 2008-08-27 | 586-441-9XXX | 9000–9999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 6003 | ROSEVILLE | MI |
| 2008-08-21 | 586-339-8XXX | 8000–8999 | Assigned | METROPCS, INC. | 5562 | NEW HAVEN | MI |
| 2008-08-19 | 586-435-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 6003 | ROSEVILLE | 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.