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 |
|---|---|---|---|---|---|---|---|
| 2005-03-10 | 517-507-6XXX | 6000–6999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | LANSING | MI |
| 2005-03-10 | 517-908-2XXX | 2000–2999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | LANSING | MI |
| 2005-03-09 | 517-477-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7157 | HOLT | MI |
| 2005-03-09 | 517-477-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7157 | HOLT | MI |
| 2005-03-04 | 517-507-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MI | 6120 | LANSING | MI |
| 2005-03-04 | 517-507-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MI | 6120 | LANSING | MI |
| 2005-03-04 | 517-507-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MI | 6120 | LANSING | MI |
| 2005-03-04 | 517-667-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | CHARLOTTE | MI |
| 2005-03-04 | 517-667-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | CHARLOTTE | MI |
| 2005-03-04 | 517-833-7XXX | 7000–7999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7157 | MASON | MI |
| 2005-02-25 | 517-392-4XXX | 4000–4999 | Assigned | PAETEC ITEL, LLC | 829J | JACKSON | MI |
| 2005-02-25 | 517-466-4XXX | 4000–4999 | Assigned | PAETEC ITEL, LLC | 829J | DANSVILLE | MI |
| 2005-02-25 | 517-477-4XXX | 4000–4999 | Assigned | PAETEC ITEL, LLC | 829J | HOLT | MI |
| 2005-02-25 | 517-541-6XXX | 6000–6999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | CHARLOTTE | MI |
| 2005-02-25 | 517-630-7XXX | 7000–7999 | Assigned | PAETEC ITEL, LLC | 829J | ALBION | MI |
| 2005-02-25 | 517-667-5XXX | 5000–5999 | Assigned | PAETEC ITEL, LLC | 829J | CHARLOTTE | MI |
| 2005-02-25 | 517-797-8XXX | 8000–8999 | Assigned | PAETEC ITEL, LLC | 829J | HILLSDALE | MI |
| 2005-02-25 | 517-833-8XXX | 8000–8999 | Assigned | PAETEC ITEL, LLC | 829J | MASON | MI |
| 2005-02-25 | 517-915-5XXX | 5000–5999 | Assigned | PAETEC ITEL, LLC | 829J | FOWLERVL | MI |
| 2005-02-23 | 517-386-2XXX | 2000–2999 | Assigned | PAETEC ITEL, LLC | 829J | EATON RPD | MI |
| 2005-02-23 | 517-589-1XXX | 1000–1999 | Assigned | PAETEC ITEL, LLC | 829J | LESLIE | MI |
| 2005-02-17 | 517-203-8XXX | 8000–8999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | LANSING | MI |
| 2005-02-17 | 517-203-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | LANSING | MI |
| 2005-02-17 | 517-466-8XXX | 8000–8999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7157 | DANSVILLE | MI |
| 2005-02-17 | 517-466-9XXX | 9000–9999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7157 | DANSVILLE | MI |
| 2005-02-15 | 517-392-3XXX | 3000–3999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | JACKSON | MI |
| 2005-02-15 | 517-902-2XXX | 2000–2999 | Assigned | METROPCS, INC. | 5562 | ADRIAN | MI |
| 2005-02-11 | 517-488-0XXX | 0000–0999 | Assigned | PAETEC ITEL, LLC | 829J | LANSING | MI |
| 2005-02-09 | 517-451-0XXX | 0000–0999 | Assigned | DEERFIELD FARMERS' TELEPHONE COMPANY - MI | 558A | BRITTON | MI |
| 2005-02-07 | 517-308-1XXX | 1000–1999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7157 | DIMONDALE | MI |
| 2005-02-07 | 517-386-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7157 | EATON RPD | MI |
| 2005-02-07 | 517-386-5XXX | 5000–5999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7157 | EATON RPD | MI |
| 2005-02-07 | 517-477-1XXX | 1000–1999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7157 | HOLT | MI |
| 2005-02-07 | 517-477-2XXX | 2000–2999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7157 | HOLT | MI |
| 2005-02-07 | 517-646-1XXX | 1000–1999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7157 | DIMONDALE | MI |
| 2005-02-07 | 517-652-6XXX | 6000–6999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7157 | CHARLOTTE | MI |
| 2005-01-31 | 517-425-7XXX | 7000–7999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | HILLSDALE | MI |
| 2005-01-31 | 517-575-3XXX | 3000–3999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | LANSING | MI |
| 2005-01-31 | 517-575-4XXX | 4000–4999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | LANSING | MI |
| 2005-01-28 | 517-668-7XXX | 7000–7999 | Assigned | 123.NET, LLC | 2550 | DE WITT | MI |
| 2005-01-27 | 517-917-1XXX | 1000–1999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | JACKSON | MI |
| 2005-01-21 | 517-376-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MI | 6120 | HOWELL | MI |
| 2005-01-20 | 517-338-3XXX | 3000–3999 | Assigned | MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI | 7279 | HOWELL | MI |
| 2005-01-14 | 517-507-2XXX | 2000–2999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | LANSING | MI |
| 2005-01-13 | 517-392-5XXX | 5000–5999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | JACKSON | MI |
| 2005-01-12 | 517-575-1XXX | 1000–1999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | LANSING | MI |
| 2005-01-12 | 517-575-2XXX | 2000–2999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | LANSING | MI |
| 2004-12-30 | 517-803-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MI | 6120 | LANSING | MI |
| 2004-12-29 | 517-879-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MI | 6120 | JACKSON | MI |
| 2004-12-21 | 517-288-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | SUNFIELD | 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.