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
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Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2021-11-01 517-291-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 ADRIAN MI
2021-11-01 517-291-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 ADRIAN MI
2021-11-01 517-291-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 ADRIAN MI
2021-11-01 517-291-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 ADRIAN MI
2021-10-29 517-271-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H NASHVILLE MI
2021-10-29 517-271-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H NASHVILLE MI
2021-10-29 517-293-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H LESLIE MI
2021-10-29 517-293-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H LESLIE MI
2021-10-29 517-378-7XXX 7000–7999Assigned ONVOY SPECTRUM, LLC 624H POTTERVL MI
2021-10-29 517-378-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H POTTERVL MI
2021-10-26 517-553-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H HOWELL MI
2021-10-26 517-553-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H HOWELL MI
2021-10-18 517-297-7XXX 7000–7999Assigned ONVOY, LLCV - MI 543C HILLSDALE MI
2021-10-18 517-736-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C COLDWATER MI
2021-10-18 517-736-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C COLDWATER MI
2021-10-18 517-758-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C HOLT MI
2021-10-18 517-758-8XXX 8000–8999Assigned ONVOY, LLCV - MI 543C HOLT MI
2021-10-18 517-842-2XXX 2000–2999Assigned ONVOY, LLCV - MI 543C GRASS LAKE MI
2021-10-15 517-302-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 FOWLERVL MI
2021-10-15 517-302-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 FOWLERVL MI
2021-10-15 517-302-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 FOWLERVL MI
2021-10-15 517-302-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 FOWLERVL MI
2021-10-13 517-428-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 FOWLERVL MI
2021-10-13 517-428-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 FOWLERVL MI
2021-10-04 517-378-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 POTTERVL MI
2021-09-29 517-553-9XXX 9000–9999Assigned METROPCS, INC. 5562 HOWELL MI
2021-09-29 517-664-3XXX 3000–3999Assigned TERRA NOVA TELECOM INC. 145J LANSING MI
2021-09-28 517-297-2XXX 2000–2999Assigned METROPCS, INC. 5562 HILLSDALE MI
2021-09-27 517-924-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 COLDWATER MI
2021-09-27 517-924-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 COLDWATER MI
2021-09-27 517-924-8XXX 8000–8999Assigned METROPCS, INC. 5562 COLDWATER MI
2021-09-17 517-462-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 COLDWATER MI
2021-09-17 517-744-4XXX 4000–4999Assigned SKYE TELECOM LLC DBA SKYETEL 622J LANSING MI
2021-09-13 517-537-0XXX 0000–0999Assigned COMMIO, LLC 939H HOWELL MI
2021-09-13 517-579-3XXX 3000–3999Assigned COMMIO, LLC 939H HOWELL MI
2021-09-13 517-579-5XXX 5000–5999Assigned COMMIO, LLC 939H HOWELL MI
2021-09-13 517-579-9XXX 9000–9999Assigned COMMIO, LLC 939H HOWELL MI
2021-09-03 517-297-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HILLSDALE MI
2021-09-03 517-633-3XXX 3000–3999Assigned SKYE TELECOM LLC DBA SKYETEL 622J ADRIAN MI
2021-08-30 517-356-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 LANSING MI
2021-08-30 517-356-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 LANSING MI
2021-08-30 517-356-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 LANSING MI
2021-08-30 517-356-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 LANSING MI
2021-08-30 517-356-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 LANSING MI
2021-08-30 517-356-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 LANSING MI
2021-08-30 517-356-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 LANSING MI
2021-08-30 517-356-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 LANSING MI
2021-08-30 517-786-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 CHARLOTTE MI
2021-08-30 517-786-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 CHARLOTTE MI
2021-08-30 517-786-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 CHARLOTTE 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.