NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

10 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026

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
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Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2021-05-19 517-919-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H LAINGSBURG MI
2021-05-19 517-928-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H MASON MI
2021-05-19 517-948-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H MULLIKEN MI
2021-05-19 517-992-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H WILLIAMSTN MI
2021-05-18 517-239-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H DE WITT MI
2021-05-18 517-261-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H GRANDLEDGE MI
2021-05-18 517-401-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H MORENCI MI
2021-05-18 517-428-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H FOWLERVL MI
2021-05-18 517-457-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H TIPTON MI
2021-05-18 517-465-9XXX 9000–9999Assigned ONVOY SPECTRUM, LLC 624H ALBION MI
2021-05-18 517-550-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H DIMONDALE MI
2021-05-18 517-565-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H FITCHBURG MI
2021-05-18 517-641-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H BATH MI
2021-05-18 517-786-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H CHARLOTTE MI
2021-05-18 517-842-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H GRASS LAKE MI
2021-05-18 517-889-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H HOLT MI
2021-05-18 517-907-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H CLARKLAKE MI
2021-05-18 517-955-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H DANSVILLE MI
2021-05-18 517-972-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H BELL OAK MI
2021-05-17 517-280-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H ADRIAN MI
2021-05-17 517-682-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H BLISSFIELD MI
2021-05-17 517-701-0XXX 0000–0999Assigned ONVOY SPECTRUM, LLC 624H CLINTON MI
2021-04-26 517-400-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H LANSING MI
2021-04-26 517-400-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H LANSING MI
2021-04-21 517-280-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ADRIAN MI
2021-04-20 517-928-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 MASON MI
2021-04-15 517-867-4XXX 4000–4999Assigned METROPCS, INC. 5562 JACKSON MI
2021-04-13 517-201-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C LESLIE MI
2021-04-08 517-770-0XXX 0000–0999Assigned COMMIO, LLC 939H LANSING MI
2021-04-07 517-649-0XXX 0000–0999Assigned TERRA NOVA TELECOM INC. 145J MULLIKEN MI
2021-04-07 517-769-3XXX 3000–3999Assigned TERRA NOVA TELECOM INC. 145J JACKSON MI
2021-04-01 517-786-7XXX 7000–7999Assigned FRACTEL, LLC 965H CHARLOTTE MI
2021-03-26 517-343-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C ALBION MI
2021-03-26 517-343-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C ALBION MI
2021-03-26 517-418-3XXX 3000–3999Assigned ONVOY, LLCV - MI 543C HOMER MI
2021-03-26 517-429-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 HUDSON MI
2021-03-26 517-459-3XXX 3000–3999Assigned ONVOY, LLCV - MI 543C PARMA MI
2021-03-26 517-459-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C PARMA MI
2021-03-26 517-480-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C STOCKBDG MI
2021-03-26 517-547-1XXX 1000–1999Assigned ONVOY, LLCV - MI 543C ADDISON MI
2021-03-26 517-565-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C FITCHBURG MI
2021-03-22 517-291-1XXX 1000–1999Assigned STRATUS NETWORKS 495J ADRIAN MI
2021-03-16 517-247-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 JACKSON MI
2021-03-16 517-247-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 JACKSON MI
2021-02-25 517-401-1XXX 1000–1999Assigned ONVOY, LLCV - MI 543C MORENCI MI
2021-02-25 517-596-0XXX 0000–0999Assigned ONVOY, LLCV - MI 543C MUNITH MI
2021-02-25 517-652-0XXX 0000–0999Assigned ONVOY, LLCV - MI 543C CHARLOTTE MI
2021-02-25 517-781-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 COLDWATER MI
2021-02-25 517-983-1XXX 1000–1999Assigned ONVOY, LLCV - MI 543C CHARLOTTE MI
2021-02-24 517-855-5XXX 5000–5999Assigned TERRA NOVA TELECOM INC. 145J LANSING 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.