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 |
|---|---|---|---|---|---|---|---|
| 2008-08-18 | 517-826-5XXX | 5000–5999 | Assigned | COMCAST IP PHONE, LLC | 318J | JONESVILLE | MI |
| 2008-08-08 | 517-213-7XXX | 7000–7999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - MI | 770E | CHARLOTTE | MI |
| 2008-07-10 | 517-594-5XXX | 5000–5999 | Assigned | COMCAST IP PHONE, LLC | 318J | OSSEO | MI |
| 2008-07-08 | 517-499-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | JACKSON | MI |
| 2008-06-27 | 517-579-1XXX | 1000–1999 | Assigned | FIRST COMMUNICATIONS, LLC | 460K | HOWELL | MI |
| 2008-06-26 | 517-518-6XXX | 6000–6999 | Assigned | ONVOY, LLCV - MI | 543C | HOWELL | MI |
| 2008-06-10 | 517-920-4XXX | 4000–4999 | Assigned | COMCAST IP PHONE, LLC | 318J | ADRIAN | MI |
| 2008-06-02 | 517-672-0XXX | 0000–0999 | Assigned | METROPCS, INC. | 5562 | HOWELL | MI |
| 2008-05-09 | 517-962-2XXX | 2000–2999 | Assigned | COMCAST IP PHONE, LLC | 318J | JACKSON | MI |
| 2008-05-07 | 517-441-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MI | 6120 | EATON RPD | MI |
| 2008-05-07 | 517-878-5XXX | 5000–5999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MI | 6120 | LESLIE | MI |
| 2008-05-01 | 517-292-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MI | 6120 | HOWELL | MI |
| 2008-04-28 | 517-969-7XXX | 7000–7999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MI | 6120 | MASON | MI |
| 2008-04-28 | 517-969-8XXX | 8000–8999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MI | 6120 | MASON | MI |
| 2008-04-18 | 517-969-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MI | 6120 | MASON | MI |
| 2008-04-16 | 517-219-9XXX | 9000–9999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MI | 6120 | FOWLERVL | MI |
| 2008-04-14 | 517-915-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MI | 6120 | FOWLERVL | MI |
| 2008-04-11 | 517-574-7XXX | 7000–7999 | Assigned | CLEAR RATE COMMUNICATIONS, LLC | 046L | LANSING | MI |
| 2008-04-11 | 517-962-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | JACKSON | MI |
| 2008-04-07 | 517-499-6XXX | 6000–6999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 6003 | JACKSON | MI |
| 2008-03-21 | 517-701-1XXX | 1000–1999 | Assigned | DEERFIELD FARMERS' TELEPHONE COMPANY - MI | 558A | CLINTON | MI |
| 2008-03-18 | 517-983-2XXX | 2000–2999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | CHARLOTTE | MI |
| 2008-03-13 | 517-889-5XXX | 5000–5999 | Assigned | COMCAST IP PHONE, LLC | 318J | HOLT | MI |
| 2008-03-11 | 517-515-9XXX | 9000–9999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | LANSING | MI |
| 2008-03-04 | 517-894-0XXX | 0000–0999 | Assigned | METROPCS, INC. | 5562 | LANSING | MI |
| 2008-03-04 | 517-894-1XXX | 1000–1999 | Assigned | METROPCS, INC. | 5562 | LANSING | MI |
| 2008-03-04 | 517-894-2XXX | 2000–2999 | Assigned | METROPCS, INC. | 5562 | LANSING | MI |
| 2008-03-04 | 517-894-3XXX | 3000–3999 | Assigned | METROPCS, INC. | 5562 | LANSING | MI |
| 2008-03-04 | 517-894-4XXX | 4000–4999 | Assigned | METROPCS, INC. | 5562 | LANSING | MI |
| 2008-03-03 | 517-416-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 6003 | JACKSON | MI |
| 2008-02-20 | 517-301-4XXX | 4000–4999 | Assigned | DEERFIELD FARMERS' TELEPHONE COMPANY - MI | 558A | TECUMSEH | MI |
| 2008-02-14 | 517-252-6XXX | 6000–6999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MI | 6120 | ADDISON | MI |
| 2008-02-08 | 517-499-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | JACKSON | MI |
| 2008-02-07 | 517-918-7XXX | 7000–7999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | ADRIAN | MI |
| 2008-01-31 | 517-481-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MI | 6120 | LANSING | MI |
| 2008-01-31 | 517-481-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MI | 6120 | LANSING | MI |
| 2008-01-30 | 517-677-7XXX | 7000–7999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | COLDWATER | MI |
| 2008-01-30 | 517-889-9XXX | 9000–9999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MI | 6120 | HOLT | MI |
| 2008-01-25 | 517-755-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | LANSING | MI |
| 2008-01-25 | 517-755-7XXX | 7000–7999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | LANSING | MI |
| 2008-01-22 | 517-325-3XXX | 3000–3999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MI | 6120 | LANSING | MI |
| 2008-01-22 | 517-709-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MI | 6120 | HOLT | MI |
| 2008-01-22 | 517-709-4XXX | 4000–4999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MI | 6120 | HOLT | MI |
| 2008-01-21 | 517-441-7XXX | 7000–7999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - MI | 770E | EATON RPD | MI |
| 2008-01-18 | 517-438-6XXX | 6000–6999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | ADRIAN | MI |
| 2008-01-16 | 517-962-4XXX | 4000–4999 | Assigned | COMCAST IP PHONE, LLC | 318J | JACKSON | MI |
| 2008-01-16 | 517-962-5XXX | 5000–5999 | Assigned | COMCAST IP PHONE, LLC | 318J | JACKSON | MI |
| 2008-01-11 | 517-306-6XXX | 6000–6999 | Assigned | COMCAST IP PHONE, LLC | 318J | HUDSON | MI |
| 2007-12-21 | 517-499-2XXX | 2000–2999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | JACKSON | MI |
| 2007-12-14 | 517-917-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | JACKSON | 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.