NumberResearchRecent thousands-block assignments
10 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026
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 |
|---|---|---|---|---|---|---|---|
| 2024-09-24 | 517-426-2XXX | 2000–2999 | Assigned | COMCAST IP PHONE, LLC | 318J | MUNITH | MI |
| 2024-09-24 | 517-628-6XXX | 6000–6999 | Assigned | COMCAST IP PHONE, LLC | 318J | ONONDAGA | MI |
| 2024-09-17 | 517-465-1XXX | 1000–1999 | Assigned | COMCAST IP PHONE, LLC | 318J | ALBION | MI |
| 2024-09-16 | 517-382-2XXX | 2000–2999 | Assigned | COMCAST IP PHONE, LLC | 318J | LESLIE | MI |
| 2024-09-04 | 517-299-3XXX | 3000–3999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | LANSING | MI |
| 2024-09-04 | 517-299-4XXX | 4000–4999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | LANSING | MI |
| 2024-08-28 | 517-595-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - MI | 991E | WALDRON | MI |
| 2024-08-28 | 517-709-5XXX | 5000–5999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | HOLT | MI |
| 2024-08-27 | 517-588-2XXX | 2000–2999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | CHARLOTTE | MI |
| 2024-08-20 | 517-299-2XXX | 2000–2999 | Assigned | BANDWIDTH.COM CLEC, LLC - MI | 991E | LANSING | MI |
| 2024-08-20 | 517-314-6XXX | 6000–6999 | Assigned | BANDWIDTH.COM CLEC, LLC - MI | 991E | JACKSON | MI |
| 2024-08-20 | 517-379-0XXX | 0000–0999 | Assigned | BANDWIDTH.COM CLEC, LLC - MI | 991E | BUNDY HILL | MI |
| 2024-08-15 | 517-895-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - MI | 991E | CONCORD | MI |
| 2024-08-14 | 517-213-0XXX | 0000–0999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | CHARLOTTE | MI |
| 2024-08-14 | 517-440-1XXX | 1000–1999 | Assigned | NUSO, LLC | 478J | LANSING | MI |
| 2024-08-14 | 517-514-2XXX | 2000–2999 | Assigned | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI | 6003 | CLINTON | MI |
| 2024-08-06 | 517-893-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | LANSING | MI |
| 2024-07-03 | 517-680-2XXX | 2000–2999 | Assigned | FIRST COMMUNICATIONS, LLC | 460K | ALBION | MI |
| 2024-06-11 | 517-399-5XXX | 5000–5999 | Assigned | BOOST SUBSCRIBERCO L.L.C. | 490J | EATON RPD | MI |
| 2024-06-04 | 517-919-9XXX | 9000–9999 | Assigned | CHARTER IP ENABLED SERVICES, LLC | 792K | LAINGSBURG | MI |
| 2024-05-13 | 517-380-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | HOWELL | MI |
| 2024-05-07 | 517-583-5XXX | 5000–5999 | Assigned | ONVOY SPECTRUM, LLC | 624H | TEKONSHA | MI |
| 2024-05-07 | 517-756-2XXX | 2000–2999 | Assigned | ONVOY SPECTRUM, LLC | 624H | UNION CITY | MI |
| 2024-05-07 | 517-774-5XXX | 5000–5999 | Assigned | ONVOY SPECTRUM, LLC | 624H | COLDWTR LK | MI |
| 2024-05-07 | 517-858-6XXX | 6000–6999 | Assigned | ONVOY SPECTRUM, LLC | 624H | BRONSON | MI |
| 2024-05-07 | 517-939-5XXX | 5000–5999 | Assigned | ONVOY SPECTRUM, LLC | 624H | QUINCY | MI |
| 2024-05-03 | 517-698-9XXX | 9000–9999 | Assigned | BANDWIDTH.COM CLEC, LLC - MI | 991E | NORTHADAMS | MI |
| 2024-04-24 | 517-350-0XXX | 0000–0999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | LANSING | MI |
| 2024-04-24 | 517-350-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | LANSING | MI |
| 2024-04-19 | 517-359-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | STOCKBDG | MI |
| 2024-04-19 | 517-695-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | RANSOM | MI |
| 2024-04-15 | 517-514-4XXX | 4000–4999 | Assigned | ONVOY, LLCV - MI | 543C | CLINTON | MI |
| 2024-04-15 | 517-514-5XXX | 5000–5999 | Assigned | ONVOY, LLCV - MI | 543C | CLINTON | MI |
| 2024-04-10 | 517-297-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | HILLSDALE | MI |
| 2024-04-10 | 517-370-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | MONTGOMERY | MI |
| 2024-04-10 | 517-594-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | OSSEO | MI |
| 2024-04-10 | 517-696-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | PRATTVILLE | MI |
| 2024-04-10 | 517-698-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | NORTHADAMS | MI |
| 2024-04-03 | 517-399-8XXX | 8000–8999 | Assigned | ONVOY SPECTRUM, LLC | 624H | EATON RPD | MI |
| 2024-04-03 | 517-890-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | HANOVER | MI |
| 2024-04-03 | 517-891-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | FRONTIER | MI |
| 2024-04-03 | 517-895-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CONCORD | MI |
| 2024-04-03 | 517-991-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CAMDEN | MI |
| 2024-03-27 | 517-733-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | ADDISON | MI |
| 2024-03-27 | 517-900-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | BUNDY HILL | MI |
| 2024-03-27 | 517-932-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | ALLEN | MI |
| 2024-03-27 | 517-938-1XXX | 1000–1999 | Assigned | ONVOY SPECTRUM, LLC | 624H | BROOKLYN | MI |
| 2024-03-27 | 517-946-0XXX | 0000–0999 | Assigned | ONVOY SPECTRUM, LLC | 624H | CAMBRIA | MI |
| 2024-02-23 | 517-633-1XXX | 1000–1999 | Assigned | NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | ADRIAN | MI |
| 2024-02-21 | 517-362-7XXX | 7000–7999 | Assigned | OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC | 2964 | MASON | MI |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.