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 |
|---|---|---|---|---|---|---|---|
| 2006-11-09 | 517-917-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MI | 6120 | JACKSON | MI |
| 2006-11-08 | 517-431-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MI | 6120 | TIPTON | MI |
| 2006-11-08 | 517-651-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MI | 6120 | LAINGSBURG | MI |
| 2006-11-03 | 517-879-6XXX | 6000–6999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | JACKSON | MI |
| 2006-11-03 | 517-879-7XXX | 7000–7999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | JACKSON | MI |
| 2006-10-31 | 517-531-0XXX | 0000–0999 | Assigned | COMCAST IP PHONE, LLC | 318J | PARMA | MI |
| 2006-10-26 | 517-763-8XXX | 8000–8999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | LANSING | MI |
| 2006-10-26 | 517-763-9XXX | 9000–9999 | Assigned | METROPCS, INC. | 5562 | LANSING | MI |
| 2006-10-24 | 517-936-6XXX | 6000–6999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | JACKSON | MI |
| 2006-10-24 | 517-936-7XXX | 7000–7999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | JACKSON | MI |
| 2006-10-13 | 517-853-5XXX | 5000–5999 | Assigned | ACD TELECOM, INC. - MI | 3535 | LANSING | MI |
| 2006-10-13 | 517-853-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MI | 6120 | LANSING | MI |
| 2006-10-12 | 517-283-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MI | 6120 | READING | MI |
| 2006-10-12 | 517-301-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MI | 6120 | TECUMSEH | MI |
| 2006-10-10 | 517-960-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | JACKSON | MI |
| 2006-09-18 | 517-398-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | HILLSDALE | MI |
| 2006-09-13 | 517-488-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | LANSING | MI |
| 2006-08-31 | 517-709-3XXX | 3000–3999 | Assigned | COMCAST IP PHONE, LLC | 318J | HOLT | MI |
| 2006-08-22 | 517-682-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MI | 6120 | BLISSFIELD | MI |
| 2006-08-22 | 517-759-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MI | 6120 | ADRIAN | MI |
| 2006-08-18 | 517-977-0XXX | 0000–0999 | Assigned | COMCAST IP PHONE, LLC | 318J | LANSING | MI |
| 2006-08-18 | 517-977-1XXX | 1000–1999 | Assigned | COMCAST IP PHONE, LLC | 318J | LANSING | MI |
| 2006-08-15 | 517-455-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MI | 6120 | LANSING | MI |
| 2006-08-07 | 517-518-3XXX | 3000–3999 | Assigned | GRID 4 COMMUNICATIONS, INC. - MI | 9714 | HOWELL | MI |
| 2006-08-04 | 517-803-0XXX | 0000–0999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | LANSING | MI |
| 2006-08-02 | 517-960-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | JACKSON | MI |
| 2006-08-02 | 517-960-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | JACKSON | MI |
| 2006-08-01 | 517-488-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | LANSING | MI |
| 2006-07-24 | 517-708-1XXX | 1000–1999 | Assigned | CYNERGYCOMM.NET, INC. - MI | 9245 | LANSING | MI |
| 2006-06-30 | 517-442-4XXX | 4000–4999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | ADRIAN | MI |
| 2006-06-23 | 517-639-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MI | 6120 | QUINCY | MI |
| 2006-06-08 | 517-960-7XXX | 7000–7999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | JACKSON | MI |
| 2006-06-08 | 517-960-8XXX | 8000–8999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | JACKSON | MI |
| 2006-05-25 | 517-624-0XXX | 0000–0999 | Assigned | ONVOY, LLCV - MI | 543C | DE WITT | MI |
| 2006-05-19 | 517-588-5XXX | 5000–5999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | CHARLOTTE | MI |
| 2006-05-19 | 517-993-1XXX | 1000–1999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | LANSING | MI |
| 2006-05-19 | 517-993-2XXX | 2000–2999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | LANSING | MI |
| 2006-05-17 | 517-227-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MI | 6120 | COLDWATER | MI |
| 2006-05-17 | 517-755-1XXX | 1000–1999 | Assigned | ONVOY, LLCV - MI | 543C | LANSING | MI |
| 2006-05-17 | 517-755-2XXX | 2000–2999 | Assigned | ONVOY, LLCV - MI | 543C | LANSING | MI |
| 2006-05-17 | 517-755-3XXX | 3000–3999 | Assigned | ONVOY, LLCV - MI | 543C | LANSING | MI |
| 2006-05-17 | 517-755-4XXX | 4000–4999 | Assigned | ONVOY, LLCV - MI | 543C | LANSING | MI |
| 2006-05-17 | 517-755-5XXX | 5000–5999 | Assigned | ONVOY, LLCV - MI | 543C | LANSING | MI |
| 2006-05-04 | 517-960-6XXX | 6000–6999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | JACKSON | MI |
| 2006-05-02 | 517-448-1XXX | 1000–1999 | Assigned | DEERFIELD FARMERS' TELEPHONE COMPANY - MI | 558A | HUDSON | MI |
| 2006-05-02 | 517-458-3XXX | 3000–3999 | Assigned | DEERFIELD FARMERS' TELEPHONE COMPANY - MI | 558A | MORENCI | MI |
| 2006-04-19 | 517-488-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | LANSING | MI |
| 2006-04-12 | 517-774-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MI | 6120 | COLDWTR LK | MI |
| 2006-04-12 | 517-858-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MI | 6120 | BRONSON | MI |
| 2006-04-06 | 517-985-1XXX | 1000–1999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MI | 6120 | STOCKBDG | 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.