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 |
|---|---|---|---|---|---|---|---|
| 2015-08-20 | 313-775-3XXX | 3000–3999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | DETROITZN3 | MI |
| 2015-08-20 | 313-775-4XXX | 4000–4999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | DETROITZN3 | MI |
| 2015-08-20 | 313-775-5XXX | 5000–5999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | DETROITZN3 | MI |
| 2015-08-20 | 313-775-6XXX | 6000–6999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | DETROITZN3 | MI |
| 2015-08-20 | 313-775-7XXX | 7000–7999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | DETROITZN3 | MI |
| 2015-08-20 | 313-775-8XXX | 8000–8999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | DETROITZN3 | MI |
| 2015-08-20 | 313-775-9XXX | 9000–9999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | DETROITZN3 | MI |
| 2015-08-17 | 313-985-2XXX | 2000–2999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | DETROITZN3 | MI |
| 2015-08-17 | 313-985-3XXX | 3000–3999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | DETROITZN3 | MI |
| 2015-08-17 | 313-985-4XXX | 4000–4999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | DETROITZN3 | MI |
| 2015-08-17 | 313-985-5XXX | 5000–5999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | DETROITZN3 | MI |
| 2015-08-13 | 313-293-3XXX | 3000–3999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - MI | 770E | DETROITZN1 | MI |
| 2015-08-13 | 313-800-0XXX | 0000–0999 | Assigned | ONVOY, LLCV - MI | 543C | DETROITZN1 | MI |
| 2015-08-13 | 313-800-8XXX | 8000–8999 | Assigned | ONVOY, LLCV - MI | 543C | DETROITZN1 | MI |
| 2015-08-12 | 313-263-7XXX | 7000–7999 | Assigned | BANDWIDTH.COM CLEC, LLC - MI | 991E | DETROITZN1 | MI |
| 2015-08-12 | 313-290-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - MI | 991E | DETROITZN2 | MI |
| 2015-08-12 | 313-315-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - MI | 991E | DETROITZN5 | MI |
| 2015-08-12 | 313-985-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - MI | 991E | DETROITZN3 | MI |
| 2015-08-07 | 313-442-7XXX | 7000–7999 | Assigned | ONVOY, LLCV - MI | 543C | DETROITZN1 | MI |
| 2015-07-24 | 313-398-4XXX | 4000–4999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | DETROITZN1 | MI |
| 2015-07-24 | 313-398-5XXX | 5000–5999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | DETROITZN1 | MI |
| 2015-07-24 | 313-398-6XXX | 6000–6999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | DETROITZN1 | MI |
| 2015-07-24 | 313-398-7XXX | 7000–7999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | DETROITZN1 | MI |
| 2015-07-24 | 313-398-8XXX | 8000–8999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | DETROITZN1 | MI |
| 2015-07-24 | 313-398-9XXX | 9000–9999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | DETROITZN1 | MI |
| 2015-07-17 | 313-888-0XXX | 0000–0999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | DETROITZN1 | MI |
| 2015-07-17 | 313-888-1XXX | 1000–1999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | DETROITZN1 | MI |
| 2015-07-17 | 313-888-2XXX | 2000–2999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | DETROITZN1 | MI |
| 2015-07-17 | 313-888-3XXX | 3000–3999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | DETROITZN1 | MI |
| 2015-07-17 | 313-888-4XXX | 4000–4999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | DETROITZN1 | MI |
| 2015-07-17 | 313-888-5XXX | 5000–5999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | DETROITZN1 | MI |
| 2015-07-17 | 313-888-6XXX | 6000–6999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | DETROITZN1 | MI |
| 2015-07-17 | 313-888-7XXX | 7000–7999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | DETROITZN1 | MI |
| 2015-07-01 | 313-789-8XXX | 8000–8999 | Assigned | COMCAST IP PHONE, LLC | 318J | DETROITZN6 | MI |
| 2015-06-30 | 313-888-9XXX | 9000–9999 | Assigned | COMCAST IP PHONE, LLC | 318J | DETROITZN1 | MI |
| 2015-06-26 | 313-777-0XXX | 0000–0999 | Assigned | ONVOY, LLCV - MI | 543C | DETROITZN3 | MI |
| 2015-06-26 | 313-777-1XXX | 1000–1999 | Assigned | ONVOY, LLCV - MI | 543C | DETROITZN3 | MI |
| 2015-06-26 | 313-777-2XXX | 2000–2999 | Assigned | ONVOY, LLCV - MI | 543C | DETROITZN3 | MI |
| 2015-06-26 | 313-777-3XXX | 3000–3999 | Assigned | ONVOY, LLCV - MI | 543C | DETROITZN3 | MI |
| 2015-06-26 | 313-777-4XXX | 4000–4999 | Assigned | ONVOY, LLCV - MI | 543C | DETROITZN3 | MI |
| 2015-06-26 | 313-777-5XXX | 5000–5999 | Assigned | ONVOY, LLCV - MI | 543C | DETROITZN3 | MI |
| 2015-06-26 | 313-777-6XXX | 6000–6999 | Assigned | ONVOY, LLCV - MI | 543C | DETROITZN3 | MI |
| 2015-06-26 | 313-777-9XXX | 9000–9999 | Assigned | ONVOY, LLCV - MI | 543C | DETROITZN3 | MI |
| 2015-06-05 | 313-221-7XXX | 7000–7999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | DETROITZN1 | MI |
| 2015-06-05 | 313-818-7XXX | 7000–7999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | DETROITZN1 | MI |
| 2015-06-02 | 313-290-2XXX | 2000–2999 | Assigned | COMCAST IP PHONE, LLC | 318J | DETROITZN2 | MI |
| 2015-06-02 | 313-789-4XXX | 4000–4999 | Assigned | BANDWIDTH.COM CLEC, LLC - MI | 991E | DETROITZN6 | MI |
| 2015-05-21 | 313-290-6XXX | 6000–6999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | DETROITZN2 | MI |
| 2015-05-21 | 313-290-7XXX | 7000–7999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | DETROITZN2 | MI |
| 2015-05-21 | 313-290-8XXX | 8000–8999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | DETROITZN2 | 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.