NumberResearchRecent thousands-block assignments
10 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 517
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 |
|---|---|---|---|---|---|---|---|
| 2008-12-31 | 517-908-4XXX | 4000–4999 | Assigned | ACD TELECOM, INC. - MI | 3535 | LANSING | MI |
| 2008-12-08 | 517-574-6XXX | 6000–6999 | Assigned | METROPCS, INC. | 5562 | LANSING | MI |
| 2008-12-08 | 517-894-8XXX | 8000–8999 | Assigned | METROPCS, INC. | 5562 | LANSING | MI |
| 2008-12-08 | 517-894-9XXX | 9000–9999 | Assigned | METROPCS, INC. | 5562 | LANSING | MI |
| 2008-11-26 | 517-610-7XXX | 7000–7999 | Assigned | ONVOY, LLCV - MI | 543C | HILLSDALE | MI |
| 2008-11-26 | 517-612-8XXX | 8000–8999 | Assigned | ONVOY, LLCV - MI | 543C | JACKSON | MI |
| 2008-11-26 | 517-936-5XXX | 5000–5999 | Assigned | ONVOY, LLCV - MI | 543C | JACKSON | MI |
| 2008-11-26 | 517-962-0XXX | 0000–0999 | Assigned | ONVOY, LLCV - MI | 543C | JACKSON | MI |
| 2008-11-21 | 517-569-4XXX | 4000–4999 | Assigned | COMCAST IP PHONE, LLC | 318J | RIVES JCT | MI |
| 2008-11-21 | 517-579-2XXX | 2000–2999 | Assigned | COMCAST IP PHONE, LLC | 318J | HOWELL | MI |
| 2008-11-21 | 517-641-9XXX | 9000–9999 | Assigned | COMCAST IP PHONE, LLC | 318J | BATH | MI |
| 2008-11-21 | 517-895-4XXX | 4000–4999 | Assigned | COMCAST IP PHONE, LLC | 318J | CONCORD | MI |
| 2008-11-21 | 517-992-4XXX | 4000–4999 | Assigned | COMCAST IP PHONE, LLC | 318J | WILLIAMSTN | MI |
| 2008-11-20 | 517-481-5XXX | 5000–5999 | Assigned | ONVOY, LLCV - MI | 543C | LANSING | MI |
| 2008-11-20 | 517-481-6XXX | 6000–6999 | Assigned | ONVOY, LLCV - MI | 543C | LANSING | MI |
| 2008-11-20 | 517-515-5XXX | 5000–5999 | Assigned | ONVOY, LLCV - MI | 543C | LANSING | MI |
| 2008-11-20 | 517-515-6XXX | 6000–6999 | Assigned | ONVOY, LLCV - MI | 543C | LANSING | MI |
| 2008-11-20 | 517-515-7XXX | 7000–7999 | Assigned | ONVOY, LLCV - MI | 543C | LANSING | MI |
| 2008-11-18 | 517-920-2XXX | 2000–2999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | ADRIAN | MI |
| 2008-11-18 | 517-920-3XXX | 3000–3999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | ADRIAN | MI |
| 2008-11-14 | 517-894-6XXX | 6000–6999 | Assigned | METROPCS, INC. | 5562 | LANSING | MI |
| 2008-11-14 | 517-894-7XXX | 7000–7999 | Assigned | METROPCS, INC. | 5562 | LANSING | MI |
| 2008-11-07 | 517-515-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | LANSING | MI |
| 2008-11-07 | 517-515-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | LANSING | MI |
| 2008-11-05 | 517-962-1XXX | 1000–1999 | Assigned | METROPCS, INC. | 5562 | JACKSON | MI |
| 2008-11-05 | 517-962-3XXX | 3000–3999 | Assigned | METROPCS, INC. | 5562 | JACKSON | MI |
| 2008-10-29 | 517-680-7XXX | 7000–7999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - MI | 770E | ALBION | MI |
| 2008-10-28 | 517-616-1XXX | 1000–1999 | Assigned | ONVOY, LLCV - MI | 543C | DIMONDALE | MI |
| 2008-10-06 | 517-607-7XXX | 7000–7999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - MI | 770E | HILLSDALE | MI |
| 2008-09-17 | 517-305-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MI | 6120 | CLARKLAKE | MI |
| 2008-09-17 | 517-990-8XXX | 8000–8999 | Assigned | COMCAST IP PHONE, LLC | 318J | JACKSON | MI |
| 2008-09-15 | 517-962-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 6003 | JACKSON | MI |
| 2008-09-05 | 517-306-9XXX | 9000–9999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MI | 6120 | HUDSON | MI |
| 2008-09-03 | 517-213-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | CHARLOTTE | MI |
| 2008-09-03 | 517-518-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | HOWELL | MI |
| 2008-09-03 | 517-742-7XXX | 7000–7999 | Assigned | AT&T ENTERPRISES, LLC | 516C | HOLT | MI |
| 2008-09-03 | 517-894-5XXX | 5000–5999 | Assigned | METROPCS, INC. | 5562 | LANSING | MI |
| 2008-08-28 | 517-219-3XXX | 3000–3999 | Assigned | METROPCS, INC. | 5562 | FOWLERVL | MI |
| 2008-08-28 | 517-626-4XXX | 4000–4999 | Assigned | METROPCS, INC. | 5562 | GRANDLEDGE | MI |
| 2008-08-28 | 517-962-6XXX | 6000–6999 | Assigned | METROPCS, INC. | 5562 | JACKSON | MI |
| 2008-08-27 | 517-499-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | JACKSON | MI |
| 2008-08-27 | 517-499-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | JACKSON | MI |
| 2008-08-21 | 517-574-4XXX | 4000–4999 | Assigned | COMCAST IP PHONE, LLC | 318J | LANSING | MI |
| 2008-08-21 | 517-574-5XXX | 5000–5999 | Assigned | COMCAST IP PHONE, LLC | 318J | LANSING | MI |
| 2008-08-21 | 517-755-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | LANSING | MI |
| 2008-08-21 | 517-755-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | LANSING | MI |
| 2008-08-19 | 517-554-3XXX | 3000–3999 | Assigned | FIRST COMMUNICATIONS, LLC | 460K | ALBION | MI |
| 2008-08-18 | 517-610-5XXX | 5000–5999 | Assigned | COMCAST IP PHONE, LLC | 318J | HILLSDALE | MI |
| 2008-08-18 | 517-698-5XXX | 5000–5999 | Assigned | COMCAST IP PHONE, LLC | 318J | NORTHADAMS | MI |
| 2008-08-18 | 517-790-5XXX | 5000–5999 | Assigned | COMCAST IP PHONE, LLC | 318J | MOSHERVL | 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.