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
2020-04-09 231-227-3XXX 3000–3999Assigned ONVOY, LLCV - MI 543C HONOR MI
2020-04-09 231-227-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C HONOR MI
2020-04-09 231-227-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C HONOR MI
2020-04-09 231-227-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C HONOR MI
2020-04-09 231-244-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C BOYNE CITY MI
2020-04-09 231-244-8XXX 8000–8999Assigned ONVOY, LLCV - MI 543C BOYNE CITY MI
2020-04-09 231-244-9XXX 9000–9999Assigned ONVOY, LLCV - MI 543C BOYNE CITY MI
2020-04-09 231-262-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C ELMIRA MI
2020-04-09 231-272-3XXX 3000–3999Assigned ONVOY, LLCV - MI 543C KINGSLEY MI
2020-04-09 231-272-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C KINGSLEY MI
2020-04-09 231-272-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C KINGSLEY MI
2020-04-09 231-272-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C KINGSLEY MI
2020-04-09 231-310-2XXX 2000–2999Assigned ONVOY, LLCV - MI 543C FALMOUTH MI
2020-04-09 231-310-3XXX 3000–3999Assigned ONVOY, LLCV - MI 543C FALMOUTH MI
2020-04-09 231-310-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C FALMOUTH MI
2020-04-09 231-310-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C FALMOUTH MI
2020-04-09 231-359-2XXX 2000–2999Assigned ONVOY, LLCV - MI 543C MECOSTA MI
2020-04-09 231-359-3XXX 3000–3999Assigned ONVOY, LLCV - MI 543C MECOSTA MI
2020-04-09 231-359-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C MECOSTA MI
2020-04-09 231-729-2XXX 2000–2999Assigned ONVOY, LLCV - MI 543C IRONS MI
2020-04-09 231-729-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C IRONS MI
2020-04-07 231-600-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 TRAVERSECY MI
2020-03-30 231-285-0XXX 0000–0999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G CADILLAC MI
2020-03-20 231-636-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E HOWARDCITY MI
2020-03-18 231-875-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E FRUITPORT MI
2020-02-20 231-688-8XXX 8000–8999Assigned FRACTEL, LLC 965H MERRITT MI
2020-02-20 231-977-7XXX 7000–7999Assigned FRACTEL, LLC 965H MACKINAWCY MI
2020-02-18 231-221-3XXX 3000–3999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G HARBOR SPG MI
2020-02-18 231-771-3XXX 3000–3999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G ELK RAPIDS MI
2020-02-18 231-818-4XXX 4000–4999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G CHEBOYGAN MI
2020-02-13 231-262-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ELMIRA MI
2020-02-13 231-340-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ELMIRA MI
2020-01-10 231-285-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 CADILLAC MI
2020-01-10 231-285-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 CADILLAC MI
2020-01-10 231-285-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 CADILLAC MI
2020-01-09 231-244-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E BOYNE CITY MI
2020-01-06 231-253-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 CADILLAC MI
2020-01-06 231-253-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 CADILLAC MI
2019-12-23 231-279-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 BIG RAPIDS MI
2019-12-20 231-600-0XXX 0000–0999Assigned FRACTEL, LLC 965H TRAVERSECY MI
2019-12-20 231-600-6XXX 6000–6999Assigned FRACTEL, LLC 965H TRAVERSECY MI
2019-12-12 231-900-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MUSKEGON MI
2019-12-05 231-212-0XXX 0000–0999Assigned 123.NET, LLC 2550 INTERLOCHN MI
2019-11-19 231-202-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E MECOSTA MI
2019-11-19 231-202-3XXX 3000–3999Assigned ONVOY, LLCV - MI 543C MECOSTA MI
2019-11-19 231-202-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C MECOSTA MI
2019-11-18 231-771-2XXX 2000–2999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G ELK RAPIDS MI
2019-11-14 231-493-0XXX 0000–0999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E TRAVERSECY MI
2019-11-01 231-253-0XXX 0000–0999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E CADILLAC MI
2019-10-29 231-221-8XXX 8000–8999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G HARBOR SPG 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.