NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

7 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 231
NEW CINGULAR WIRELESS PCS, LLC - IL 2
EXIANT COMMUNICATIONS LLC 2
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 2
AHOI LLC 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
2021-05-19 231-289-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H CHARLEVOIX MI
2021-05-19 231-293-3XXX 3000–3999Assigned ONVOY, LLCV - MI 543C FRANKFORT MI
2021-05-19 231-300-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H ALDEN MI
2021-05-19 231-304-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H BRUTUS MI
2021-05-19 231-386-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C NORTHPORT MI
2021-05-19 231-400-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H ALANSON MI
2021-05-19 231-449-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H BALDWIN MI
2021-05-19 231-495-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H BELLAIRE MI
2021-05-19 231-545-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H BOYNEFALLS MI
2021-05-19 231-588-8XXX 8000–8999Assigned ONVOY, LLCV - MI 543C ELLSWORTH MI
2021-05-19 231-625-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H CHEBOYGAN MI
2021-05-19 231-634-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H BOIS BLANC MI
2021-05-19 231-867-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H CHIPPEWALK MI
2021-05-19 231-871-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H BEULAH MI
2021-05-19 231-970-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H BEAR LAKE MI
2021-05-19 231-999-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H CENTRAL LK MI
2021-05-17 231-743-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 7157 MARION MI
2021-05-14 231-293-9XXX 9000–9999Assigned HD CARRIER LLC 321J FRANKFORT MI
2021-05-13 231-296-0XXX 0000–0999Assigned CHARTER IP ENABLED SERVICES, LLC 792K FREMONT MI
2021-05-13 231-298-0XXX 0000–0999Assigned CHARTER IP ENABLED SERVICES, LLC 792K IRONS MI
2021-05-13 231-381-0XXX 0000–0999Assigned CHARTER IP ENABLED SERVICES, LLC 792K WHITECLOUD MI
2021-05-13 231-449-0XXX 0000–0999Assigned CHARTER IP ENABLED SERVICES, LLC 792K BALDWIN MI
2021-05-11 231-278-0XXX 0000–0999Assigned CHARTER IP ENABLED SERVICES, LLC 792K HESPERIA MI
2021-05-11 231-464-2XXX 2000–2999Assigned CHARTER IP ENABLED SERVICES, LLC 792K FREESOIL MI
2021-05-07 231-852-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LUDINGTON MI
2021-04-26 231-283-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H MUSKEGON MI
2021-04-14 231-267-2XXX 2000–2999Assigned ONVOY, LLCV - MI 543C WILLIAMSBG MI
2021-04-14 231-284-2XXX 2000–2999Assigned ONVOY, LLCV - MI 543C MANISTEE MI
2021-04-14 231-322-9XXX 9000–9999Assigned ONVOY, LLCV - MI 543C TRCHRIVBDG MI
2021-04-14 231-977-2XXX 2000–2999Assigned ONVOY, LLCV - MI 543C MACKINAWCY MI
2021-04-08 231-567-3XXX 3000–3999Assigned METROPCS, INC. 5562 MUSKEGON MI
2021-03-31 231-559-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E MCBAIN MI
2021-03-26 231-251-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C LKLEELANAU MI
2021-03-26 231-265-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C CORAL MI
2021-03-26 231-273-2XXX 2000–2999Assigned ONVOY, LLCV - MI 543C EASTPORT MI
2021-03-26 231-389-8XXX 8000–8999Assigned ONVOY, LLCV - MI 543C HARRIETTA MI
2021-03-26 231-495-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C BELLAIRE MI
2021-03-25 231-786-7XXX 7000–7999Assigned FRACTEL, LLC 965H TRAVERSECY MI
2021-03-02 231-284-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MANISTEE MI
2021-03-01 231-753-1XXX 1000–1999Assigned ONVOY, LLCV - MI 543C PETOSKEY MI
2021-03-01 231-939-0XXX 0000–0999Assigned ONVOY, LLCV - MI 543C PETOSKEY MI
2021-02-25 231-247-7XXX 7000–7999Assigned ONVOY, LLCV - MI 543C WILLIAMSBG MI
2021-02-25 231-272-0XXX 0000–0999Assigned ONVOY, LLCV - MI 543C KINGSLEY MI
2021-02-25 231-272-1XXX 1000–1999Assigned ONVOY, LLCV - MI 543C KINGSLEY MI
2021-02-25 231-322-8XXX 8000–8999Assigned ONVOY, LLCV - MI 543C TRCHRIVBDG MI
2021-02-25 231-408-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 BIG RAPIDS MI
2021-02-25 231-422-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C PELLSTON MI
2021-02-25 231-707-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 NEWAYGO MI
2021-02-25 231-835-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C GLEN LAKE MI
2021-02-25 231-835-9XXX 9000–9999Assigned ONVOY, LLCV - MI 543C GLEN LAKE 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.