NumberResearchRecent thousands-block assignments
6 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 313
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 |
|---|---|---|---|---|---|---|---|
| 2025-06-23 | 313-750-5XXX | 5000–5999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | DETROITZN4 | MI |
| 2025-06-23 | 313-750-6XXX | 6000–6999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | DETROITZN4 | MI |
| 2025-06-20 | 313-807-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | DETROITZN5 | MI |
| 2025-06-20 | 313-807-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | DETROITZN5 | MI |
| 2025-06-20 | 313-807-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | DETROITZN5 | MI |
| 2025-06-20 | 313-807-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | DETROITZN5 | MI |
| 2025-06-20 | 313-807-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | DETROITZN5 | MI |
| 2025-06-20 | 313-807-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | DETROITZN5 | MI |
| 2025-06-20 | 313-807-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | DETROITZN5 | MI |
| 2025-06-20 | 313-807-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | DETROITZN5 | MI |
| 2025-06-13 | 313-616-0XXX | 0000–0999 | Assigned | NUSO, LLC | 732J | DETROITZN1 | MI |
| 2025-06-13 | 313-616-1XXX | 1000–1999 | Assigned | NUSO, LLC | 732J | DETROITZN1 | MI |
| 2025-06-09 | 313-616-4XXX | 4000–4999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - MI | 770E | DETROITZN1 | MI |
| 2025-06-06 | 313-762-5XXX | 5000–5999 | Assigned | LEAP TELECOM, LLC | 616J | DETROITZN1 | MI |
| 2025-05-22 | 313-785-3XXX | 3000–3999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | DETROITZN6 | MI |
| 2025-05-22 | 313-785-4XXX | 4000–4999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | DETROITZN6 | MI |
| 2025-05-22 | 313-785-5XXX | 5000–5999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | DETROITZN6 | MI |
| 2025-05-21 | 313-483-5XXX | 5000–5999 | Assigned | ONVOY, LLCV - MI | 543C | DETROITZN1 | MI |
| 2025-05-21 | 313-734-0XXX | 0000–0999 | Assigned | ONVOY, LLCV - MI | 543C | DETROITZN1 | MI |
| 2025-05-21 | 313-762-4XXX | 4000–4999 | Assigned | ONVOY, LLCV - MI | 543C | DETROITZN1 | MI |
| 2025-05-21 | 313-771-1XXX | 1000–1999 | Assigned | ONVOY, LLCV - MI | 543C | DETROITZN1 | MI |
| 2025-05-21 | 313-776-5XXX | 5000–5999 | Assigned | ONVOY, LLCV - MI | 543C | DETROITZN1 | MI |
| 2025-05-02 | 313-798-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | DETROITZN5 | MI |
| 2025-05-02 | 313-798-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | DETROITZN5 | MI |
| 2025-04-22 | 313-798-0XXX | 0000–0999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 6003 | DETROITZN5 | MI |
| 2025-04-22 | 313-798-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 6003 | DETROITZN5 | MI |
| 2025-04-22 | 313-798-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 6003 | DETROITZN5 | MI |
| 2025-04-22 | 313-798-3XXX | 3000–3999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 6003 | DETROITZN5 | MI |
| 2025-04-22 | 313-798-4XXX | 4000–4999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 6003 | DETROITZN5 | MI |
| 2025-04-22 | 313-798-5XXX | 5000–5999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 6003 | DETROITZN5 | MI |
| 2025-04-22 | 313-798-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 6003 | DETROITZN5 | MI |
| 2025-04-22 | 313-798-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 6003 | DETROITZN5 | MI |
| 2025-04-11 | 313-501-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | DETROITZN6 | MI |
| 2025-04-11 | 313-501-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | DETROITZN6 | MI |
| 2025-04-11 | 313-501-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | DETROITZN6 | MI |
| 2025-04-11 | 313-501-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | DETROITZN6 | MI |
| 2025-04-11 | 313-501-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | DETROITZN6 | MI |
| 2025-04-11 | 313-501-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | DETROITZN6 | MI |
| 2025-04-11 | 313-501-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | DETROITZN6 | MI |
| 2025-04-11 | 313-785-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | DETROITZN6 | MI |
| 2025-04-11 | 313-785-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | DETROITZN6 | MI |
| 2025-04-11 | 313-785-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | DETROITZN6 | MI |
| 2025-04-11 | 313-785-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | DETROITZN6 | MI |
| 2025-04-02 | 313-620-0XXX | 0000–0999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | DETROITZN3 | MI |
| 2025-04-02 | 313-620-1XXX | 1000–1999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | DETROITZN3 | MI |
| 2025-03-27 | 313-228-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | DETROITZN6 | MI |
| 2025-03-27 | 313-228-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | DETROITZN6 | MI |
| 2025-03-27 | 313-427-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | DETROITZN6 | MI |
| 2025-03-27 | 313-501-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | DETROITZN6 | MI |
| 2025-03-27 | 313-501-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | DETROITZN6 | 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.