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 |
|---|---|---|---|---|---|---|---|
| 2007-06-07 | 517-580-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MI | 6120 | LANSING | MI |
| 2007-06-05 | 517-580-3XXX | 3000–3999 | Assigned | COMCAST IP PHONE, LLC | 318J | LANSING | MI |
| 2007-06-05 | 517-580-4XXX | 4000–4999 | Assigned | COMCAST IP PHONE, LLC | 318J | LANSING | MI |
| 2007-05-11 | 517-554-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MI | 6120 | ALBION | MI |
| 2007-05-11 | 517-969-9XXX | 9000–9999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MI | 6120 | MASON | MI |
| 2007-05-11 | 517-992-9XXX | 9000–9999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MI | 6120 | WILLIAMSTN | MI |
| 2007-05-10 | 517-499-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | JACKSON | MI |
| 2007-05-10 | 517-499-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | JACKSON | MI |
| 2007-05-08 | 517-529-7XXX | 7000–7999 | Assigned | COMCAST IP PHONE, LLC | 318J | CLARKLAKE | MI |
| 2007-05-08 | 517-536-7XXX | 7000–7999 | Assigned | COMCAST IP PHONE, LLC | 318J | NAPOLEON | MI |
| 2007-05-08 | 517-795-1XXX | 1000–1999 | Assigned | COMCAST IP PHONE, LLC | 318J | JACKSON | MI |
| 2007-05-08 | 517-795-2XXX | 2000–2999 | Assigned | COMCAST IP PHONE, LLC | 318J | JACKSON | MI |
| 2007-05-08 | 517-926-1XXX | 1000–1999 | Assigned | COMCAST IP PHONE, LLC | 318J | GRASS LAKE | MI |
| 2007-05-03 | 517-213-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MI | 6120 | CHARLOTTE | MI |
| 2007-05-02 | 517-455-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | LANSING | MI |
| 2007-04-17 | 517-408-0XXX | 0000–0999 | Assigned | COMCAST IP PHONE, LLC | 318J | DIMONDALE | MI |
| 2007-04-11 | 517-488-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | LANSING | MI |
| 2007-04-11 | 517-488-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | LANSING | MI |
| 2007-04-11 | 517-488-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | LANSING | MI |
| 2007-04-04 | 517-441-9XXX | 9000–9999 | Assigned | COMCAST IP PHONE, LLC | 318J | EATON RPD | MI |
| 2007-04-04 | 517-925-8XXX | 8000–8999 | Assigned | COMCAST IP PHONE, LLC | 318J | GRANDLEDGE | MI |
| 2007-03-08 | 517-317-3XXX | 3000–3999 | Assigned | METROPCS, INC. | 5562 | COLDWATER | MI |
| 2007-02-27 | 517-315-1XXX | 1000–1999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | JACKSON | MI |
| 2007-02-27 | 517-706-1XXX | 1000–1999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | LANSING | MI |
| 2007-02-27 | 517-706-7XXX | 7000–7999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | LANSING | MI |
| 2007-02-27 | 517-706-9XXX | 9000–9999 | Assigned | METROPCS, INC. | 5562 | LANSING | MI |
| 2007-02-09 | 517-759-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | ADRIAN | MI |
| 2007-02-08 | 517-224-5XXX | 5000–5999 | Assigned | ONVOY, LLCV - MI | 543C | POTTERVL | MI |
| 2007-02-08 | 517-283-5XXX | 5000–5999 | Assigned | ONVOY, LLCV - MI | 543C | READING | MI |
| 2007-02-08 | 517-301-3XXX | 3000–3999 | Assigned | ONVOY, LLCV - MI | 543C | TECUMSEH | MI |
| 2007-02-08 | 517-401-4XXX | 4000–4999 | Assigned | ONVOY, LLCV - MI | 543C | MORENCI | MI |
| 2007-02-08 | 517-431-4XXX | 4000–4999 | Assigned | ONVOY, LLCV - MI | 543C | TIPTON | MI |
| 2007-02-08 | 517-480-3XXX | 3000–3999 | Assigned | ONVOY, LLCV - MI | 543C | STOCKBDG | MI |
| 2007-02-08 | 517-531-6XXX | 6000–6999 | Assigned | ONVOY, LLCV - MI | 543C | PARMA | MI |
| 2007-02-08 | 517-536-6XXX | 6000–6999 | Assigned | ONVOY, LLCV - MI | 543C | NAPOLEON | MI |
| 2007-02-08 | 517-569-1XXX | 1000–1999 | Assigned | ONVOY, LLCV - MI | 543C | RIVES JCT | MI |
| 2007-02-08 | 517-583-2XXX | 2000–2999 | Assigned | ONVOY, LLCV - MI | 543C | TEKONSHA | MI |
| 2007-02-08 | 517-596-1XXX | 1000–1999 | Assigned | ONVOY, LLCV - MI | 543C | MUNITH | MI |
| 2007-02-08 | 517-610-8XXX | 8000–8999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | HILLSDALE | MI |
| 2007-02-08 | 517-628-4XXX | 4000–4999 | Assigned | ONVOY, LLCV - MI | 543C | ONONDAGA | MI |
| 2007-02-08 | 517-639-6XXX | 6000–6999 | Assigned | ONVOY, LLCV - MI | 543C | QUINCY | MI |
| 2007-02-08 | 517-649-6XXX | 6000–6999 | Assigned | ONVOY, LLCV - MI | 543C | MULLIKEN | MI |
| 2007-02-08 | 517-743-6XXX | 6000–6999 | Assigned | ONVOY, LLCV - MI | 543C | PORTLAND | MI |
| 2007-02-08 | 517-759-8XXX | 8000–8999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | ADRIAN | MI |
| 2007-02-08 | 517-852-8XXX | 8000–8999 | Assigned | ONVOY, LLCV - MI | 543C | NASHVILLE | MI |
| 2007-02-06 | 517-252-7XXX | 7000–7999 | Assigned | ONVOY, LLCV - MI | 543C | ADDISON | MI |
| 2007-02-06 | 517-306-5XXX | 5000–5999 | Assigned | ONVOY, LLCV - MI | 543C | HUDSON | MI |
| 2007-02-06 | 517-317-6XXX | 6000–6999 | Assigned | ONVOY, LLCV - MI | 543C | COLDWATER | MI |
| 2007-02-06 | 517-418-6XXX | 6000–6999 | Assigned | ONVOY, LLCV - MI | 543C | HOMER | MI |
| 2007-02-06 | 517-441-4XXX | 4000–4999 | Assigned | ONVOY, LLCV - MI | 543C | EATON RPD | 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.