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
2021-02-25 231-866-2XXX 2000–2999Assigned ONVOY, LLCV - MI 543C SUTTONSBAY MI
2021-02-25 231-970-3XXX 3000–3999Assigned ONVOY, LLCV - MI 543C BEAR LAKE MI
2021-02-25 231-977-8XXX 8000–8999Assigned ONVOY, LLCV - MI 543C MACKINAWCY MI
2021-02-22 231-721-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 HART MI
2021-02-18 231-254-3XXX 3000–3999Assigned METROPCS, INC. 5562 PETOSKEY MI
2021-02-18 231-254-4XXX 4000–4999Assigned METROPCS, INC. 5562 PETOSKEY MI
2021-02-18 231-281-4XXX 4000–4999Assigned METROPCS, INC. 5562 CADILLAC MI
2021-02-18 231-281-5XXX 5000–5999Assigned METROPCS, INC. 5562 CADILLAC MI
2021-02-08 231-300-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C ALDEN MI
2021-02-08 231-833-1XXX 1000–1999Assigned ONVOY, LLCV - MI 543C WOLVERINE MI
2021-02-04 231-216-9XXX 9000–9999Assigned ONVOY, LLCV - MI 543C FRANKFORT MI
2021-02-04 231-221-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C HARBOR SPG MI
2021-02-04 231-221-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C HARBOR SPG MI
2021-02-04 231-273-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C EASTPORT MI
2021-02-04 231-273-7XXX 7000–7999Assigned ONVOY, LLCV - MI 543C EASTPORT MI
2021-02-04 231-281-2XXX 2000–2999Assigned ONVOY, LLCV - MI 543C CADILLAC MI
2021-02-04 231-281-3XXX 3000–3999Assigned ONVOY, LLCV - MI 543C CADILLAC MI
2021-02-04 231-300-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C ALDEN MI
2021-02-04 231-310-7XXX 7000–7999Assigned ONVOY, LLCV - MI 543C FALMOUTH MI
2021-02-04 231-310-8XXX 8000–8999Assigned ONVOY, LLCV - MI 543C FALMOUTH MI
2021-02-04 231-359-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C MECOSTA MI
2021-02-04 231-359-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C MECOSTA MI
2021-02-04 231-404-2XXX 2000–2999Assigned ONVOY, LLCV - MI 543C STANWOOD MI
2021-02-04 231-404-3XXX 3000–3999Assigned ONVOY, LLCV - MI 543C STANWOOD MI
2021-02-04 231-434-1XXX 1000–1999Assigned ONVOY, LLCV - MI 543C MANTON MI
2021-02-04 231-440-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C BALDWIN MI
2021-02-04 231-445-3XXX 3000–3999Assigned ONVOY, LLCV - MI 543C CHEBOYGAN MI
2021-02-04 231-445-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C CHEBOYGAN MI
2021-02-04 231-447-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C HOLTON MI
2021-02-04 231-447-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C HOLTON MI
2021-02-04 231-484-8XXX 8000–8999Assigned ONVOY, LLCV - MI 543C EASTJORDAN MI
2021-02-04 231-484-9XXX 9000–9999Assigned ONVOY, LLCV - MI 543C EASTJORDAN MI
2021-02-04 231-500-3XXX 3000–3999Assigned ONVOY, LLCV - MI 543C WHITEHALL MI
2021-02-04 231-500-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C WHITEHALL MI
2021-02-04 231-508-2XXX 2000–2999Assigned ONVOY, LLCV - MI 543C ONEKAMA MI
2021-02-04 231-515-0XXX 0000–0999Assigned ONVOY, LLCV - MI 543C EVART MI
2021-02-04 231-545-1XXX 1000–1999Assigned ONVOY, LLCV - MI 543C BOYNEFALLS MI
2021-02-04 231-545-3XXX 3000–3999Assigned ONVOY, LLCV - MI 543C BOYNEFALLS MI
2021-02-04 231-559-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C MCBAIN MI
2021-02-04 231-559-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C MCBAIN MI
2021-02-04 231-564-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C KALKASKA MI
2021-02-04 231-564-7XXX 7000–7999Assigned ONVOY, LLCV - MI 543C KALKASKA MI
2021-02-04 231-636-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C HOWARDCITY MI
2021-02-04 231-636-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C HOWARDCITY MI
2021-02-04 231-651-2XXX 2000–2999Assigned ONVOY, LLCV - MI 543C BEULAH MI
2021-02-04 231-651-3XXX 3000–3999Assigned ONVOY, LLCV - MI 543C BEULAH MI
2021-02-04 231-655-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C MANISTEE MI
2021-02-04 231-729-9XXX 9000–9999Assigned ONVOY, LLCV - MI 543C IRONS MI
2021-02-04 231-751-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C WALLOON LK MI
2021-02-04 231-751-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C WALLOON LK 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.