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 |
|---|---|---|---|---|---|---|---|
| 2009-11-17 | 517-731-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MI | 6120 | GRANDLEDGE | MI |
| 2009-11-12 | 517-521-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MI | 6120 | WEBBERVL | MI |
| 2009-11-11 | 517-522-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MI | 6120 | GRASS LAKE | MI |
| 2009-11-11 | 517-763-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | LANSING | MI |
| 2009-11-11 | 517-992-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MI | 6120 | WILLIAMSTN | MI |
| 2009-11-09 | 517-748-8XXX | 8000–8999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | JACKSON | MI |
| 2009-11-09 | 517-917-9XXX | 9000–9999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | JACKSON | MI |
| 2009-11-03 | 517-764-8XXX | 8000–8999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | JACKSON | MI |
| 2009-11-03 | 517-769-9XXX | 9000–9999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | JACKSON | MI |
| 2009-10-21 | 517-408-7XXX | 7000–7999 | Assigned | CLEAR RATE COMMUNICATIONS, LLC | 046L | DIMONDALE | MI |
| 2009-10-21 | 517-641-3XXX | 3000–3999 | Assigned | CLEAR RATE COMMUNICATIONS, LLC | 046L | BATH | MI |
| 2009-10-21 | 517-736-7XXX | 7000–7999 | Assigned | CLEAR RATE COMMUNICATIONS, LLC | 046L | COLDWATER | MI |
| 2009-10-21 | 517-883-7XXX | 7000–7999 | Assigned | CLEAR RATE COMMUNICATIONS, LLC | 046L | MASON | MI |
| 2009-10-14 | 517-983-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | CHARLOTTE | MI |
| 2009-10-09 | 517-315-7XXX | 7000–7999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 6003 | JACKSON | MI |
| 2009-10-06 | 517-861-8XXX | 8000–8999 | Assigned | PAETEC ITEL, LLC | 829J | HOWELL | MI |
| 2009-09-25 | 517-889-7XXX | 7000–7999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - MI | 770E | HOLT | MI |
| 2009-09-23 | 517-303-2XXX | 2000–2999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | LANSING | MI |
| 2009-09-23 | 517-303-7XXX | 7000–7999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | LANSING | MI |
| 2009-09-23 | 517-879-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MI | 6120 | JACKSON | MI |
| 2009-09-16 | 517-919-1XXX | 1000–1999 | Assigned | DAYSTARR LLC DBA DAYSTARR COMMUNICATIONS | 993L | LAINGSBURG | MI |
| 2009-09-14 | 517-920-5XXX | 5000–5999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | ADRIAN | MI |
| 2009-09-14 | 517-920-6XXX | 6000–6999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | ADRIAN | MI |
| 2009-09-04 | 517-748-1XXX | 1000–1999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 6003 | JACKSON | MI |
| 2009-09-04 | 517-748-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | JACKSON | MI |
| 2009-09-04 | 517-908-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MI | 6120 | LANSING | MI |
| 2009-08-28 | 517-597-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | SUNFIELD | MI |
| 2009-08-28 | 517-877-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | LITCHFIELD | MI |
| 2009-08-27 | 517-224-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | POTTERVL | MI |
| 2009-08-27 | 517-306-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | HUDSON | MI |
| 2009-08-27 | 517-441-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | EATON RPD | MI |
| 2009-08-27 | 517-458-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | MORENCI | MI |
| 2009-08-27 | 517-462-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | COLDWATER | MI |
| 2009-08-27 | 517-486-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | BLISSFIELD | MI |
| 2009-08-27 | 517-607-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | HILLSDALE | MI |
| 2009-08-27 | 517-624-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | DE WITT | MI |
| 2009-08-27 | 517-626-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | GRANDLEDGE | MI |
| 2009-08-27 | 517-630-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | ALBION | MI |
| 2009-08-27 | 517-726-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | VERMONTVL | MI |
| 2009-08-27 | 517-815-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | TECUMSEH | MI |
| 2009-08-27 | 517-851-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | STOCKBDG | MI |
| 2009-08-27 | 517-883-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | MASON | MI |
| 2009-08-27 | 517-889-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | HOLT | MI |
| 2009-08-27 | 517-909-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | DANSVILLE | MI |
| 2009-08-27 | 517-910-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | ONONDAGA | MI |
| 2009-08-27 | 517-919-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | LAINGSBURG | MI |
| 2009-08-27 | 517-920-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | ADRIAN | MI |
| 2009-08-27 | 517-921-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | ADDISON | MI |
| 2009-08-27 | 517-929-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | HOMER | MI |
| 2009-08-27 | 517-994-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | PORTLAND | 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.