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 |
|---|---|---|---|---|---|---|---|
| 2015-05-21 | 313-290-9XXX | 9000–9999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | DETROITZN2 | MI |
| 2015-05-21 | 313-979-0XXX | 0000–0999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | DETROITZN2 | MI |
| 2015-05-21 | 313-979-1XXX | 1000–1999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | DETROITZN2 | MI |
| 2015-05-21 | 313-979-2XXX | 2000–2999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | DETROITZN2 | MI |
| 2015-05-21 | 313-979-3XXX | 3000–3999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | DETROITZN2 | MI |
| 2015-05-21 | 313-979-4XXX | 4000–4999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | DETROITZN2 | MI |
| 2015-05-21 | 313-979-5XXX | 5000–5999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | DETROITZN2 | MI |
| 2015-05-21 | 313-979-6XXX | 6000–6999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | DETROITZN2 | MI |
| 2015-05-21 | 313-979-7XXX | 7000–7999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | DETROITZN2 | MI |
| 2015-05-21 | 313-979-8XXX | 8000–8999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | DETROITZN2 | MI |
| 2015-05-21 | 313-979-9XXX | 9000–9999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | DETROITZN2 | MI |
| 2015-05-19 | 313-818-2XXX | 2000–2999 | Assigned | FIRST COMMUNICATIONS, LLC | 460K | DETROITZN1 | MI |
| 2015-05-19 | 313-818-5XXX | 5000–5999 | Assigned | FIRST COMMUNICATIONS, LLC | 460K | DETROITZN1 | MI |
| 2015-05-19 | 313-936-2XXX | 2000–2999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | DETROITZN2 | MI |
| 2015-05-19 | 313-936-4XXX | 4000–4999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | DETROITZN2 | MI |
| 2015-05-15 | 313-936-3XXX | 3000–3999 | Assigned | PAETEC ITEL, LLC | 829J | DETROITZN2 | MI |
| 2015-05-13 | 313-413-0XXX | 0000–0999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | DETROITZN4 | MI |
| 2015-05-13 | 313-413-1XXX | 1000–1999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | DETROITZN4 | MI |
| 2015-05-13 | 313-413-2XXX | 2000–2999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | DETROITZN4 | MI |
| 2015-05-13 | 313-413-3XXX | 3000–3999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | DETROITZN4 | MI |
| 2015-05-13 | 313-413-4XXX | 4000–4999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | DETROITZN4 | MI |
| 2015-05-13 | 313-413-5XXX | 5000–5999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | DETROITZN4 | MI |
| 2015-05-13 | 313-413-6XXX | 6000–6999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | DETROITZN4 | MI |
| 2015-05-13 | 313-413-7XXX | 7000–7999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | DETROITZN4 | MI |
| 2015-05-13 | 313-413-8XXX | 8000–8999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | DETROITZN4 | MI |
| 2015-05-13 | 313-413-9XXX | 9000–9999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | DETROITZN4 | MI |
| 2015-05-13 | 313-635-2XXX | 2000–2999 | Assigned | COMCAST IP PHONE, LLC | 318J | DETROITZN4 | MI |
| 2015-05-13 | 313-747-0XXX | 0000–0999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | DETROITZN4 | MI |
| 2015-05-13 | 313-747-6XXX | 6000–6999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | DETROITZN4 | MI |
| 2015-05-13 | 313-747-7XXX | 7000–7999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | DETROITZN4 | MI |
| 2015-05-13 | 313-747-8XXX | 8000–8999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | DETROITZN4 | MI |
| 2015-05-13 | 313-747-9XXX | 9000–9999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | DETROITZN4 | MI |
| 2015-04-16 | 313-818-6XXX | 6000–6999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - MI | 770E | DETROITZN1 | MI |
| 2015-04-14 | 313-888-8XXX | 8000–8999 | Assigned | ONVOY, LLCV - MI | 543C | DETROITZN1 | MI |
| 2015-03-11 | 313-936-1XXX | 1000–1999 | Assigned | GRID 4 COMMUNICATIONS, INC. - MI | 9714 | DETROITZN2 | MI |
| 2015-03-10 | 313-789-1XXX | 1000–1999 | Assigned | ONVOY, LLCV - MI | 543C | DETROITZN6 | MI |
| 2015-03-10 | 313-789-2XXX | 2000–2999 | Assigned | ONVOY, LLCV - MI | 543C | DETROITZN6 | MI |
| 2015-03-10 | 313-789-3XXX | 3000–3999 | Assigned | ONVOY, LLCV - MI | 543C | DETROITZN6 | MI |
| 2015-02-24 | 313-855-6XXX | 6000–6999 | Assigned | AT&T ENTERPRISES, LLC | 516C | DETROITZN4 | MI |
| 2015-02-19 | 313-777-7XXX | 7000–7999 | Assigned | ONVOY, LLCV - MI | 543C | DETROITZN3 | MI |
| 2015-02-19 | 313-777-8XXX | 8000–8999 | Assigned | ONVOY, LLCV - MI | 543C | DETROITZN3 | MI |
| 2015-02-03 | 313-789-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - MI | 991E | DETROITZN6 | MI |
| 2015-02-03 | 313-818-1XXX | 1000–1999 | Assigned | BANDWIDTH.COM CLEC, LLC - MI | 991E | DETROITZN1 | MI |
| 2015-02-03 | 313-855-5XXX | 5000–5999 | Assigned | BANDWIDTH.COM CLEC, LLC - MI | 991E | DETROITZN4 | MI |
| 2015-02-03 | 313-936-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - MI | 991E | DETROITZN2 | MI |
| 2015-02-03 | 313-985-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - MI | 991E | DETROITZN3 | MI |
| 2015-01-26 | 313-985-6XXX | 6000–6999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | DETROITZN3 | MI |
| 2015-01-26 | 313-985-7XXX | 7000–7999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | DETROITZN3 | MI |
| 2015-01-26 | 313-985-8XXX | 8000–8999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | DETROITZN3 | MI |
| 2015-01-26 | 313-985-9XXX | 9000–9999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | DETROITZN3 | 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.