NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

10 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

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
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 5
MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 1
LEVEL 3 COMMUNICATIONS, LLC - MI 1
INTRADO COMMUNICATIONS, LLC 1
BOOST SUBSCRIBERCO L.L.C. 1
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
Clear Download CSV ↓
Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2007-02-06 517-451-3XXX 3000–3999Assigned ONVOY, LLCV - MI 543C BRITTON MI
2007-02-06 517-522-7XXX 7000–7999Assigned ONVOY, LLCV - MI 543C GRASS LAKE MI
2007-02-06 517-541-7XXX 7000–7999Assigned ONVOY, LLCV - MI 543C CHARLOTTE MI
2007-02-06 517-554-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C ALBION MI
2007-02-06 517-641-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C BATH MI
2007-02-06 517-646-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C DIMONDALE MI
2007-02-06 517-672-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C HOWELL MI
2007-02-06 517-682-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C BLISSFIELD MI
2007-02-06 517-709-7XXX 7000–7999Assigned ONVOY, LLCV - MI 543C HOLT MI
2007-02-06 517-748-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C JACKSON MI
2007-02-06 517-759-7XXX 7000–7999Assigned ONVOY, LLCV - MI 543C ADRIAN MI
2007-02-06 517-765-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C BURLINGTON MI
2007-02-06 517-878-7XXX 7000–7999Assigned ONVOY, LLCV - MI 543C LESLIE MI
2007-02-06 517-915-1XXX 1000–1999Assigned ONVOY, LLCV - MI 543C FOWLERVL MI
2007-02-06 517-925-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C GRANDLEDGE MI
2007-02-06 517-968-0XXX 0000–0999Assigned ONVOY, LLCV - MI 543C DANSVILLE MI
2007-02-06 517-969-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C MASON MI
2007-02-02 517-708-2XXX 2000–2999Assigned ONVOY, LLCV - MI 543C LANSING MI
2007-02-02 517-708-3XXX 3000–3999Assigned ONVOY, LLCV - MI 543C LANSING MI
2007-02-02 517-708-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C LANSING MI
2007-01-30 517-677-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 COLDWATER MI
2007-01-30 517-763-3XXX 3000–3999Assigned METROPCS, INC. 5562 LANSING MI
2007-01-30 517-936-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 JACKSON MI
2007-01-30 517-936-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 JACKSON MI
2007-01-30 517-993-7XXX 7000–7999Assigned METROPCS, INC. 5562 LANSING MI
2007-01-30 517-993-8XXX 8000–8999Assigned METROPCS, INC. 5562 LANSING MI
2007-01-24 517-583-1XXX 1000–1999Assigned CHARTER IP ENABLED SERVICES, LLC 792K TEKONSHA MI
2007-01-24 517-705-2XXX 2000–2999Assigned CHARTER IP ENABLED SERVICES, LLC 792K BURLINGTON MI
2007-01-24 517-858-1XXX 1000–1999Assigned CHARTER IP ENABLED SERVICES, LLC 792K BRONSON MI
2007-01-23 517-444-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 CHARLOTTE MI
2007-01-17 517-238-6XXX 6000–6999Assigned CHARTER IP ENABLED SERVICES, LLC 792K COLDWTR LK MI
2007-01-17 517-376-9XXX 9000–9999Assigned CHARTER IP ENABLED SERVICES, LLC 792K HOWELL MI
2007-01-17 517-639-2XXX 2000–2999Assigned CHARTER IP ENABLED SERVICES, LLC 792K QUINCY MI
2007-01-16 517-759-3XXX 3000–3999Assigned DEERFIELD FARMERS' TELEPHONE COMPANY - MI 558A ADRIAN MI
2007-01-11 517-759-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 ADRIAN MI
2007-01-11 517-918-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 ADRIAN MI
2007-01-09 517-315-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 JACKSON MI
2007-01-09 517-315-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 JACKSON MI
2007-01-09 517-518-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J HOWELL MI
2007-01-05 517-924-0XXX 0000–0999Assigned CHARTER IP ENABLED SERVICES, LLC 792K COLDWATER MI
2006-12-20 517-763-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 LANSING MI
2006-12-20 517-763-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 LANSING MI
2006-12-20 517-763-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 LANSING MI
2006-12-20 517-763-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 LANSING MI
2006-12-19 517-455-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LANSING MI
2006-12-15 517-977-9XXX 9000–9999Assigned PAETEC ITEL, LLC 829J LANSING MI
2006-12-13 517-918-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 ADRIAN MI
2006-11-29 517-588-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 CHARLOTTE MI
2006-11-29 517-588-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 CHARLOTTE MI
2006-11-27 517-483-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LANSING 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.