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
Clear Download CSV ↓
Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2023-08-23 231-410-7XXX 7000–7999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G MANISTEE MI
2023-08-04 231-417-0XXX 0000–0999Assigned ONVOY, LLCV - MI 543C PETOSKEY MI
2023-07-27 231-431-1XXX 1000–1999Assigned ONVOY, LLCV - MI 543C CLAM RIVER MI
2023-07-26 231-413-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 KALKASKA MI
2023-07-20 231-385-9XXX 9000–9999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G CORAL MI
2023-07-14 231-428-2XXX 2000–2999Assigned ONVOY, LLCV - MI 543C MUSKEGON MI
2023-07-14 231-428-3XXX 3000–3999Assigned ONVOY, LLCV - MI 543C MUSKEGON MI
2023-07-14 231-428-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C MUSKEGON MI
2023-07-14 231-430-2XXX 2000–2999Assigned ONVOY, LLCV - MI 543C BOYNE CITY MI
2023-07-14 231-435-2XXX 2000–2999Assigned ONVOY, LLCV - MI 543C EASTPORT MI
2023-07-14 231-438-2XXX 2000–2999Assigned ONVOY, LLCV - MI 543C HARBOR SPG MI
2023-07-14 231-446-2XXX 2000–2999Assigned ONVOY, LLCV - MI 543C NORTHPORT MI
2023-07-14 231-451-2XXX 2000–2999Assigned ONVOY, LLCV - MI 543C WILLIAMSBG MI
2023-07-13 231-224-0XXX 0000–0999Assigned ONVOY, LLCV - MI 543C FREMONT MI
2023-07-13 231-278-1XXX 1000–1999Assigned ONVOY, LLCV - MI 543C HESPERIA MI
2023-07-13 231-289-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C CHARLEVOIX MI
2023-07-13 231-297-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C KINGSLEY MI
2023-07-13 231-304-9XXX 9000–9999Assigned ONVOY, LLCV - MI 543C BRUTUS MI
2023-07-13 231-374-9XXX 9000–9999Assigned ONVOY, LLCV - MI 543C SHELBY MI
2023-07-13 231-379-1XXX 1000–1999Assigned ONVOY, LLCV - MI 543C ONEKAMA MI
2023-07-13 231-380-1XXX 1000–1999Assigned ONVOY, LLCV - MI 543C NEWAYGO MI
2023-07-13 231-385-1XXX 1000–1999Assigned ONVOY, LLCV - MI 543C CORAL MI
2023-07-13 231-396-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C CADILLAC MI
2023-07-13 231-399-9XXX 9000–9999Assigned ONVOY, LLCV - MI 543C FRANKFORT MI
2023-07-13 231-400-9XXX 9000–9999Assigned ONVOY, LLCV - MI 543C ALANSON MI
2023-07-13 231-401-1XXX 1000–1999Assigned ONVOY, LLCV - MI 543C TRAVERSECY MI
2023-07-13 231-401-9XXX 9000–9999Assigned ONVOY, LLCV - MI 543C TRAVERSECY MI
2023-07-13 231-405-0XXX 0000–0999Assigned ONVOY, LLCV - MI 543C ALDEN MI
2023-07-13 231-406-0XXX 0000–0999Assigned ONVOY, LLCV - MI 543C FALMOUTH MI
2023-07-13 231-407-0XXX 0000–0999Assigned ONVOY, LLCV - MI 543C MECOSTA MI
2023-07-13 231-410-1XXX 1000–1999Assigned ONVOY, LLCV - MI 543C MANISTEE MI
2023-07-13 231-413-0XXX 0000–0999Assigned ONVOY, LLCV - MI 543C KALKASKA MI
2023-07-13 231-447-7XXX 7000–7999Assigned ONVOY, LLCV - MI 543C HOLTON MI
2023-07-13 231-455-0XXX 0000–0999Assigned ONVOY, LLCV - MI 543C PENTWATER MI
2023-07-13 231-460-9XXX 9000–9999Assigned ONVOY, LLCV - MI 543C BIG RAPIDS MI
2023-07-13 231-545-0XXX 0000–0999Assigned ONVOY, LLCV - MI 543C BOYNEFALLS MI
2023-07-13 231-746-0XXX 0000–0999Assigned ONVOY, LLCV - MI 543C CHEBOYGAN MI
2023-07-13 231-880-3XXX 3000–3999Assigned ONVOY, LLCV - MI 543C MUSKEGON MI
2023-07-13 231-880-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C MUSKEGON MI
2023-07-11 231-210-2XXX 2000–2999Assigned ONVOY, LLCV - MI 543C ST JAMES MI
2023-07-11 231-418-2XXX 2000–2999Assigned ONVOY, LLCV - MI 543C MARION MI
2023-07-11 231-419-2XXX 2000–2999Assigned ONVOY, LLCV - MI 543C BELLAIRE MI
2023-07-11 231-426-2XXX 2000–2999Assigned ONVOY, LLCV - MI 543C RAVENNA MI
2023-07-07 231-320-1XXX 1000–1999Assigned ONVOY, LLCV - MI 543C TRCHRIVBDG MI
2023-07-07 231-321-0XXX 0000–0999Assigned ONVOY, LLCV - MI 543C ELMIRA MI
2023-07-07 231-404-8XXX 8000–8999Assigned ONVOY, LLCV - MI 543C STANWOOD MI
2023-07-07 231-443-9XXX 9000–9999Assigned ONVOY, LLCV - MI 543C HONOR MI
2023-07-07 231-449-1XXX 1000–1999Assigned ONVOY, LLCV - MI 543C BALDWIN MI
2023-07-07 231-449-9XXX 9000–9999Assigned TERRA NOVA TELECOM INC. 145J BALDWIN MI
2023-07-07 231-466-0XXX 0000–0999Assigned ONVOY, LLCV - MI 543C EVART 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.