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 |
|---|---|---|---|---|---|---|---|
| 2007-12-14 | 517-917-6XXX | 6000–6999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | JACKSON | MI |
| 2007-12-14 | 517-977-4XXX | 4000–4999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | LANSING | MI |
| 2007-12-14 | 517-977-5XXX | 5000–5999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | LANSING | MI |
| 2007-12-14 | 517-977-6XXX | 6000–6999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | LANSING | MI |
| 2007-12-14 | 517-977-7XXX | 7000–7999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | LANSING | MI |
| 2007-12-12 | 517-306-8XXX | 8000–8999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 6003 | HUDSON | MI |
| 2007-12-06 | 517-252-5XXX | 5000–5999 | Assigned | COMCAST IP PHONE, LLC | 318J | ADDISON | MI |
| 2007-11-27 | 517-492-5XXX | 5000–5999 | Assigned | PAETEC ITEL, LLC | 829J | LANSING | MI |
| 2007-11-27 | 517-618-8XXX | 8000–8999 | Assigned | PAETEC ITEL, LLC | 829J | HOWELL | MI |
| 2007-11-27 | 517-917-7XXX | 7000–7999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | JACKSON | MI |
| 2007-11-27 | 517-917-8XXX | 8000–8999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | JACKSON | MI |
| 2007-11-20 | 517-708-7XXX | 7000–7999 | Assigned | COMCAST IP PHONE, LLC | 318J | LANSING | MI |
| 2007-11-20 | 517-708-8XXX | 8000–8999 | Assigned | COMCAST IP PHONE, LLC | 318J | LANSING | MI |
| 2007-11-13 | 517-908-3XXX | 3000–3999 | Assigned | COMCAST IP PHONE, LLC | 318J | LANSING | MI |
| 2007-11-02 | 517-641-2XXX | 2000–2999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MI | 6120 | BATH | MI |
| 2007-10-22 | 517-975-1XXX | 1000–1999 | Assigned | MICHIGAN BELL TEL CO | 9323 | LANSING | MI |
| 2007-10-22 | 517-975-2XXX | 2000–2999 | Assigned | MICHIGAN BELL TEL CO | 9323 | LANSING | MI |
| 2007-10-22 | 517-975-3XXX | 3000–3999 | Assigned | MICHIGAN BELL TEL CO | 9323 | LANSING | MI |
| 2007-10-22 | 517-975-6XXX | 6000–6999 | Assigned | MICHIGAN BELL TEL CO | 9323 | LANSING | MI |
| 2007-10-22 | 517-975-7XXX | 7000–7999 | Assigned | MICHIGAN BELL TEL CO | 9323 | LANSING | MI |
| 2007-10-22 | 517-975-8XXX | 8000–8999 | Assigned | MICHIGAN BELL TEL CO | 9323 | LANSING | MI |
| 2007-10-22 | 517-975-9XXX | 9000–9999 | Assigned | MICHIGAN BELL TEL CO | 9323 | LANSING | MI |
| 2007-10-18 | 517-425-6XXX | 6000–6999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | HILLSDALE | MI |
| 2007-10-09 | 517-975-0XXX | 0000–0999 | Assigned | PAETEC ITEL, LLC | 829J | LANSING | MI |
| 2007-10-04 | 517-983-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | CHARLOTTE | MI |
| 2007-10-02 | 517-901-0XXX | 0000–0999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | READING | MI |
| 2007-09-12 | 517-917-3XXX | 3000–3999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | JACKSON | MI |
| 2007-09-12 | 517-917-4XXX | 4000–4999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | JACKSON | MI |
| 2007-08-08 | 517-962-7XXX | 7000–7999 | Assigned | TELEPORT COMMUNICATIONS AMERICA, LLC - MI | 770E | JACKSON | MI |
| 2007-08-03 | 517-580-7XXX | 7000–7999 | Assigned | COMCAST IP PHONE, LLC | 318J | LANSING | MI |
| 2007-08-03 | 517-580-8XXX | 8000–8999 | Assigned | COMCAST IP PHONE, LLC | 318J | LANSING | MI |
| 2007-07-17 | 517-317-5XXX | 5000–5999 | Assigned | DAYSTARR LLC DBA DAYSTARR COMMUNICATIONS | 993L | COLDWATER | MI |
| 2007-07-13 | 517-918-4XXX | 4000–4999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | ADRIAN | MI |
| 2007-07-03 | 517-802-2XXX | 2000–2999 | Assigned | MICHIGAN BELL TEL CO | 9323 | LANSING | MI |
| 2007-07-03 | 517-802-3XXX | 3000–3999 | Assigned | MICHIGAN BELL TEL CO | 9323 | LANSING | MI |
| 2007-07-03 | 517-802-4XXX | 4000–4999 | Assigned | MICHIGAN BELL TEL CO | 9323 | LANSING | MI |
| 2007-07-03 | 517-802-5XXX | 5000–5999 | Assigned | MICHIGAN BELL TEL CO | 9323 | LANSING | MI |
| 2007-07-03 | 517-802-6XXX | 6000–6999 | Assigned | MICHIGAN BELL TEL CO | 9323 | LANSING | MI |
| 2007-06-23 | 517-890-9XXX | 9000–9999 | Assigned | COMCAST IP PHONE, LLC | 318J | HANOVER | MI |
| 2007-06-23 | 517-900-9XXX | 9000–9999 | Assigned | COMCAST IP PHONE, LLC | 318J | BUNDY HILL | MI |
| 2007-06-23 | 517-938-8XXX | 8000–8999 | Assigned | COMCAST IP PHONE, LLC | 318J | BROOKLYN | MI |
| 2007-06-19 | 517-939-0XXX | 0000–0999 | Assigned | LEVEL 3 COMMUNICATIONS, LLC - MI | 6120 | QUINCY | MI |
| 2007-06-13 | 517-451-7XXX | 7000–7999 | Assigned | COMCAST IP PHONE, LLC | 318J | BRITTON | MI |
| 2007-06-13 | 517-456-5XXX | 5000–5999 | Assigned | COMCAST IP PHONE, LLC | 318J | CLINTON | MI |
| 2007-06-13 | 517-467-5XXX | 5000–5999 | Assigned | COMCAST IP PHONE, LLC | 318J | ONSTED | MI |
| 2007-06-13 | 517-668-6XXX | 6000–6999 | Assigned | COMCAST IP PHONE, LLC | 318J | DE WITT | MI |
| 2007-06-13 | 517-759-4XXX | 4000–4999 | Assigned | COMCAST IP PHONE, LLC | 318J | ADRIAN | MI |
| 2007-06-13 | 517-815-1XXX | 1000–1999 | Assigned | COMCAST IP PHONE, LLC | 318J | TECUMSEH | MI |
| 2007-06-13 | 517-969-4XXX | 4000–4999 | Assigned | COMCAST IP PHONE, LLC | 318J | MASON | MI |
| 2007-06-12 | 517-431-5XXX | 5000–5999 | Assigned | COMCAST IP PHONE, LLC | 318J | TIPTON | 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.