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 |
|---|---|---|---|---|---|---|---|
| 2023-06-02 | 586-340-2XXX | 2000–2999 | Assigned | ONVOY, LLCV - MI | 543C | CENTERLINE | MI |
| 2023-06-02 | 586-352-2XXX | 2000–2999 | Assigned | ONVOY, LLCV - MI | 543C | MT CLEMENS | MI |
| 2023-06-02 | 586-352-3XXX | 3000–3999 | Assigned | ONVOY, LLCV - MI | 543C | MT CLEMENS | MI |
| 2023-06-02 | 586-352-4XXX | 4000–4999 | Assigned | ONVOY, LLCV - MI | 543C | MT CLEMENS | MI |
| 2023-06-02 | 586-358-1XXX | 1000–1999 | Assigned | ONVOY, LLCV - MI | 543C | UTICA | MI |
| 2023-06-02 | 586-358-2XXX | 2000–2999 | Assigned | ONVOY, LLCV - MI | 543C | UTICA | MI |
| 2023-06-02 | 586-358-3XXX | 3000–3999 | Assigned | ONVOY, LLCV - MI | 543C | UTICA | MI |
| 2023-06-02 | 586-358-4XXX | 4000–4999 | Assigned | ONVOY, LLCV - MI | 543C | UTICA | MI |
| 2023-06-02 | 586-358-6XXX | 6000–6999 | Assigned | ONVOY, LLCV - MI | 543C | UTICA | MI |
| 2023-06-02 | 586-358-7XXX | 7000–7999 | Assigned | ONVOY, LLCV - MI | 543C | UTICA | MI |
| 2023-06-02 | 586-742-3XXX | 3000–3999 | Assigned | ONVOY, LLCV - MI | 543C | ROSEVILLE | MI |
| 2023-06-02 | 586-926-7XXX | 7000–7999 | Assigned | ONVOY, LLCV - MI | 543C | WASHINGTON | MI |
| 2023-06-02 | 586-926-8XXX | 8000–8999 | Assigned | ONVOY, LLCV - MI | 543C | WASHINGTON | MI |
| 2023-05-24 | 586-301-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | WARREN | MI |
| 2023-05-24 | 586-302-4XXX | 4000–4999 | Assigned | ONVOY SPECTRUM, LLC | 624H | MT CLEMENS | MI |
| 2023-05-24 | 586-340-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CENTERLINE | MI |
| 2023-05-24 | 586-358-5XXX | 5000–5999 | Assigned | ONVOY SPECTRUM, LLC | 624H | UTICA | MI |
| 2023-05-24 | 586-435-9XXX | 9000–9999 | Assigned | ONVOY SPECTRUM, LLC | 624H | ROSEVILLE | MI |
| 2023-05-23 | 586-302-7XXX | 7000–7999 | Assigned | PEERLESS NETWORK OF MICHIGAN, LLC - MI | 933G | MT CLEMENS | MI |
| 2023-05-23 | 586-304-7XXX | 7000–7999 | Assigned | PEERLESS NETWORK OF MICHIGAN, LLC - MI | 933G | NEW HAVEN | MI |
| 2023-04-11 | 586-302-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | MT CLEMENS | MI |
| 2023-03-23 | 586-318-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 6003 | ROMEO | MI |
| 2023-03-23 | 586-318-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 6003 | ROMEO | MI |
| 2023-03-15 | 586-362-3XXX | 3000–3999 | Assigned | ONVOY SPECTRUM, LLC | 624H | ROSEVILLE | MI |
| 2023-03-07 | 586-340-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | CENTERLINE | MI |
| 2023-03-07 | 586-510-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | CENTERLINE | MI |
| 2023-02-21 | 586-358-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | UTICA | MI |
| 2023-02-16 | 586-279-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | ROSEVILLE | MI |
| 2023-02-16 | 586-362-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | ROSEVILLE | MI |
| 2023-01-30 | 586-304-8XXX | 8000–8999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | NEW HAVEN | MI |
| 2023-01-24 | 586-302-2XXX | 2000–2999 | Assigned | ONVOY, LLCV - MI | 543C | MT CLEMENS | MI |
| 2023-01-24 | 586-302-3XXX | 3000–3999 | Assigned | ONVOY, LLCV - MI | 543C | MT CLEMENS | MI |
| 2023-01-24 | 586-837-0XXX | 0000–0999 | Assigned | ONVOY, LLCV - MI | 543C | UTICA | MI |
| 2023-01-24 | 586-837-3XXX | 3000–3999 | Assigned | ONVOY, LLCV - MI | 543C | UTICA | MI |
| 2023-01-24 | 586-837-5XXX | 5000–5999 | Assigned | ONVOY, LLCV - MI | 543C | UTICA | MI |
| 2023-01-24 | 586-837-9XXX | 9000–9999 | Assigned | ONVOY, LLCV - MI | 543C | UTICA | MI |
| 2023-01-18 | 586-302-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | MT CLEMENS | MI |
| 2023-01-18 | 586-302-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | MT CLEMENS | MI |
| 2022-12-27 | 586-510-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | CENTERLINE | MI |
| 2022-12-22 | 586-318-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | ROMEO | MI |
| 2022-12-14 | 586-742-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | ROSEVILLE | MI |
| 2022-12-08 | 586-326-3XXX | 3000–3999 | Assigned | ONVOY, LLCV - MI | 543C | RICHMOND | MI |
| 2022-12-08 | 586-486-9XXX | 9000–9999 | Assigned | ONVOY, LLCV - MI | 543C | CENTERLINE | MI |
| 2022-12-02 | 586-301-5XXX | 5000–5999 | Assigned | ONVOY, LLCV - MI | 543C | WARREN | MI |
| 2022-12-02 | 586-301-6XXX | 6000–6999 | Assigned | ONVOY, LLCV - MI | 543C | WARREN | MI |
| 2022-11-17 | 586-304-6XXX | 6000–6999 | Assigned | PEERLESS NETWORK OF MICHIGAN, LLC - MI | 933G | NEW HAVEN | MI |
| 2022-11-15 | 586-301-0XXX | 0000–0999 | Assigned | ONVOY, LLCV - MI | 543C | WARREN | MI |
| 2022-11-15 | 586-328-0XXX | 0000–0999 | Assigned | ONVOY, LLCV - MI | 543C | WARREN | MI |
| 2022-11-15 | 586-837-6XXX | 6000–6999 | Assigned | ONVOY, LLCV - MI | 543C | UTICA | MI |
| 2022-11-15 | 586-837-7XXX | 7000–7999 | Assigned | ONVOY, LLCV - MI | 543C | UTICA | 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.