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
2020-08-13 231-261-8XXX 8000–8999Assigned ONVOY, LLCV - MI 543C LUDINGTON MI
2020-08-13 231-272-7XXX 7000–7999Assigned ONVOY, LLCV - MI 543C KINGSLEY MI
2020-08-13 231-272-8XXX 8000–8999Assigned ONVOY, LLCV - MI 543C KINGSLEY MI
2020-08-13 231-300-8XXX 8000–8999Assigned ONVOY, LLCV - MI 543C ALDEN MI
2020-08-13 231-300-9XXX 9000–9999Assigned ONVOY, LLCV - MI 543C ALDEN MI
2020-08-13 231-310-0XXX 0000–0999Assigned ONVOY, LLCV - MI 543C FALMOUTH MI
2020-08-13 231-310-1XXX 1000–1999Assigned ONVOY, LLCV - MI 543C FALMOUTH MI
2020-08-12 231-285-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 CADILLAC MI
2020-08-05 231-655-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 MANISTEE MI
2020-07-28 231-879-8XXX 8000–8999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E FIFE LAKE MI
2020-07-22 231-383-9XXX 9000–9999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E BEULAH MI
2020-06-29 231-216-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 7157 FRANKFORT MI
2020-06-29 231-280-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 7157 MANCELONA MI
2020-06-29 231-484-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 7157 EASTJORDAN MI
2020-06-25 231-900-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H MUSKEGON MI
2020-06-25 231-900-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H MUSKEGON MI
2020-06-25 231-900-7XXX 7000–7999Assigned ONVOY SPECTRUM, LLC 624H MUSKEGON MI
2020-06-08 231-260-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MUSKEGON MI
2020-06-08 231-260-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MUSKEGON MI
2020-06-08 231-493-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 TRAVERSECY MI
2020-06-08 231-531-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MUSKEGON MI
2020-06-08 231-531-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MUSKEGON MI
2020-06-08 231-531-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 MUSKEGON MI
2020-06-08 231-600-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 TRAVERSECY MI
2020-06-08 231-600-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 TRAVERSECY MI
2020-06-04 231-254-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 PETOSKEY MI
2020-06-04 231-900-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 MUSKEGON MI
2020-06-02 231-289-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 7157 CHARLEVOIX MI
2020-06-02 231-531-4XXX 4000–4999Assigned METROPCS, INC. 5562 MUSKEGON MI
2020-06-02 231-531-5XXX 5000–5999Assigned METROPCS, INC. 5562 MUSKEGON MI
2020-05-26 231-448-8XXX 8000–8999Assigned ONVOY, LLCV - MI 543C ST JAMES MI
2020-05-26 231-600-2XXX 2000–2999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G TRAVERSECY MI
2020-05-26 231-634-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C BOIS BLANC MI
2020-05-15 231-261-1XXX 1000–1999Assigned ONVOY, LLCV - MI 543C LUDINGTON MI
2020-05-15 231-261-2XXX 2000–2999Assigned ONVOY, LLCV - MI 543C LUDINGTON MI
2020-04-28 231-600-1XXX 1000–1999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G TRAVERSECY MI
2020-04-21 231-459-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BOYNE CITY MI
2020-04-20 231-742-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HART MI
2020-04-15 231-666-2XXX 2000–2999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MUSKEGON MI
2020-04-15 231-666-3XXX 3000–3999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MUSKEGON MI
2020-04-15 231-666-5XXX 5000–5999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MUSKEGON MI
2020-04-15 231-666-8XXX 8000–8999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MUSKEGON MI
2020-04-15 231-666-9XXX 9000–9999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MUSKEGON MI
2020-04-10 231-241-3XXX 3000–3999Assigned ONVOY, LLCV - MI 543C PENTWATER MI
2020-04-10 231-241-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C PENTWATER MI
2020-04-10 231-241-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C PENTWATER MI
2020-04-10 231-241-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C PENTWATER MI
2020-04-09 231-201-3XXX 3000–3999Assigned ONVOY, LLCV - MI 543C CHIPPEWALK MI
2020-04-09 231-201-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C CHIPPEWALK MI
2020-04-09 231-201-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C CHIPPEWALK 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.