NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

7 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 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
2022-05-04 231-856-8XXX 8000–8999Assigned TERRA NOVA TELECOM INC. 145J MORLEY MI
2022-04-26 231-563-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 MUSKEGON MI
2022-04-26 231-563-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 MUSKEGON MI
2022-04-20 231-257-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 LAKE CITY MI
2022-04-14 231-594-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C HART MI
2022-04-14 231-594-7XXX 7000–7999Assigned ONVOY, LLCV - MI 543C HART MI
2022-04-14 231-648-2XXX 2000–2999Assigned ONVOY, LLCV - MI 543C HOWARDCITY MI
2022-04-14 231-648-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C HOWARDCITY MI
2022-03-21 231-297-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C KINGSLEY MI
2022-03-21 231-324-7XXX 7000–7999Assigned ONVOY, LLCV - MI 543C HARBOR SPG MI
2022-03-21 231-380-3XXX 3000–3999Assigned ONVOY, LLCV - MI 543C NEWAYGO MI
2022-03-21 231-449-3XXX 3000–3999Assigned ONVOY, LLCV - MI 543C BALDWIN MI
2022-03-21 231-594-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C HART MI
2022-03-21 231-648-8XXX 8000–8999Assigned ONVOY, LLCV - MI 543C HOWARDCITY MI
2022-03-21 231-831-8XXX 8000–8999Assigned ONVOY, LLCV - MI 543C EASTJORDAN MI
2022-03-10 231-391-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E WALLOON LK MI
2022-03-08 231-324-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E HARBOR SPG MI
2022-03-07 231-663-3XXX 3000–3999Assigned TON80 COMMUNICATIONS, LLC 516J MESICK MI
2022-03-07 231-772-2XXX 2000–2999Assigned TON80 COMMUNICATIONS, LLC 516J WELLSTON MI
2022-03-02 231-396-3XXX 3000–3999Assigned ONVOY, LLCV - MI 543C CADILLAC MI
2022-03-02 231-397-3XXX 3000–3999Assigned ONVOY, LLCV - MI 543C MANISTEE MI
2022-03-02 231-466-7XXX 7000–7999Assigned ONVOY, LLCV - MI 543C EVART MI
2022-03-02 231-746-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C CHEBOYGAN MI
2022-03-02 231-805-1XXX 1000–1999Assigned CHARTER IP ENABLED SERVICES, LLC 792K KALEVA MI
2022-02-28 231-963-6XXX 6000–6999Assigned TON80 COMMUNICATIONS, LLC 516J MCBAIN MI
2022-02-24 231-872-6XXX 6000–6999Assigned TON80 COMMUNICATIONS, LLC 516J REED CITY MI
2022-02-22 231-566-6XXX 6000–6999Assigned TON80 COMMUNICATIONS, LLC 516J HARRIETTA MI
2022-02-22 231-699-9XXX 9000–9999Assigned TON80 COMMUNICATIONS, LLC 516J FOUNTAIN MI
2022-02-22 231-966-6XXX 6000–6999Assigned TON80 COMMUNICATIONS, LLC 516J FREESOIL MI
2022-02-18 231-402-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 MUSKEGON MI
2022-02-18 231-402-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 MUSKEGON MI
2022-02-18 231-626-3XXX 3000–3999Assigned TON80 COMMUNICATIONS, LLC 516J LEVERING MI
2022-02-18 231-746-7XXX 7000–7999Assigned TON80 COMMUNICATIONS, LLC 516J CHEBOYGAN MI
2022-02-14 231-413-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 KALKASKA MI
2022-02-14 231-413-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 KALKASKA MI
2022-02-11 231-886-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 KALKASKA MI
2022-02-04 231-405-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C ALDEN MI
2022-02-04 231-406-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C FALMOUTH MI
2022-02-04 231-407-7XXX 7000–7999Assigned ONVOY, LLCV - MI 543C MECOSTA MI
2022-02-02 231-270-2XXX 2000–2999Assigned ONVOY, LLCV - MI 543C BOYNE CITY MI
2022-02-02 231-289-8XXX 8000–8999Assigned ONVOY, LLCV - MI 543C CHARLEVOIX MI
2022-02-02 231-293-7XXX 7000–7999Assigned ONVOY, LLCV - MI 543C FRANKFORT MI
2022-02-02 231-304-8XXX 8000–8999Assigned ONVOY, LLCV - MI 543C BRUTUS MI
2022-02-02 231-320-2XXX 2000–2999Assigned ONVOY, LLCV - MI 543C TRCHRIVBDG MI
2022-02-02 231-364-2XXX 2000–2999Assigned ONVOY, LLCV - MI 543C NORTHPORT MI
2022-02-02 231-374-8XXX 8000–8999Assigned ONVOY, LLCV - MI 543C SHELBY MI
2022-02-02 231-385-3XXX 3000–3999Assigned ONVOY, LLCV - MI 543C CORAL MI
2022-02-02 231-400-2XXX 2000–2999Assigned ONVOY, LLCV - MI 543C ALANSON MI
2022-02-02 231-422-9XXX 9000–9999Assigned ONVOY, LLCV - MI 543C PELLSTON MI
2022-02-02 231-431-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C CLAM RIVER 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.