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
2016-03-16 231-266-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C IRONS MI
2016-03-16 231-266-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C IRONS MI
2016-03-16 231-768-0XXX 0000–0999Assigned ONVOY, LLCV - MI 543C LE ROY MI
2016-03-16 231-768-2XXX 2000–2999Assigned ONVOY, LLCV - MI 543C LE ROY MI
2016-03-16 231-797-3XXX 3000–3999Assigned ONVOY, LLCV - MI 543C LUTHER MI
2016-03-16 231-797-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C LUTHER MI
2016-03-15 231-403-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C WILLIAMSBG MI
2016-03-15 231-403-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C WILLIAMSBG MI
2016-03-15 231-440-2XXX 2000–2999Assigned ONVOY, LLCV - MI 543C BALDWIN MI
2016-03-15 231-440-3XXX 3000–3999Assigned ONVOY, LLCV - MI 543C BALDWIN MI
2016-03-15 231-515-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C EVART MI
2016-03-15 231-515-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C EVART MI
2016-03-15 231-667-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C MARION MI
2016-03-15 231-667-9XXX 9000–9999Assigned ONVOY, LLCV - MI 543C MARION MI
2016-03-15 231-930-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C BEULAH MI
2016-03-15 231-930-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C BEULAH MI
2016-03-14 231-787-7XXX 7000–7999Assigned ONVOY, LLCV - MI 543C WHITECLOUD MI
2016-03-14 231-787-8XXX 8000–8999Assigned ONVOY, LLCV - MI 543C WHITECLOUD MI
2016-03-02 231-640-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LAKE ANN MI
2016-03-02 231-668-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 TRAVERSECY MI
2016-03-01 231-280-0XXX 0000–0999Assigned ONVOY, LLCV - MI 543C MANCELONA MI
2016-03-01 231-280-1XXX 1000–1999Assigned ONVOY, LLCV - MI 543C MANCELONA MI
2016-03-01 231-707-7XXX 7000–7999Assigned ONVOY, LLCV - MI 543C NEWAYGO MI
2016-03-01 231-707-8XXX 8000–8999Assigned ONVOY, LLCV - MI 543C NEWAYGO MI
2016-02-25 231-246-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 MUSKEGON MI
2016-02-24 231-251-7XXX 7000–7999Assigned ONVOY, LLCV - MI 543C LKLEELANAU MI
2016-02-24 231-251-8XXX 8000–8999Assigned ONVOY, LLCV - MI 543C LKLEELANAU MI
2016-02-24 231-265-3XXX 3000–3999Assigned ONVOY, LLCV - MI 543C CORAL MI
2016-02-24 231-265-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C CORAL MI
2016-02-24 231-427-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C MACKINAWCY MI
2016-02-24 231-427-8XXX 8000–8999Assigned ONVOY, LLCV - MI 543C MACKINAWCY MI
2016-02-24 231-432-2XXX 2000–2999Assigned ONVOY, LLCV - MI 543C NORTHPORT MI
2016-02-24 231-432-9XXX 9000–9999Assigned ONVOY, LLCV - MI 543C NORTHPORT MI
2016-02-24 231-559-2XXX 2000–2999Assigned ONVOY, LLCV - MI 543C MCBAIN MI
2016-02-24 231-559-3XXX 3000–3999Assigned ONVOY, LLCV - MI 543C MCBAIN MI
2016-02-24 231-667-6XXX 6000–6999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G MARION MI
2016-02-24 231-751-1XXX 1000–1999Assigned ONVOY, LLCV - MI 543C WALLOON LK MI
2016-02-24 231-751-2XXX 2000–2999Assigned ONVOY, LLCV - MI 543C WALLOON LK MI
2016-02-24 231-774-8XXX 8000–8999Assigned ONVOY, LLCV - MI 543C INTERLOCHN MI
2016-02-24 231-790-0XXX 0000–0999Assigned ONVOY, LLCV - MI 543C FREESOIL MI
2016-02-24 231-790-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C FREESOIL MI
2016-02-24 231-791-3XXX 3000–3999Assigned ONVOY, LLCV - MI 543C REED CITY MI
2016-02-24 231-791-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C REED CITY MI
2016-02-24 231-819-2XXX 2000–2999Assigned ONVOY, LLCV - MI 543C TUSTIN MI
2016-02-24 231-819-3XXX 3000–3999Assigned ONVOY, LLCV - MI 543C TUSTIN MI
2016-02-23 231-244-1XXX 1000–1999Assigned ONVOY, LLCV - MI 543C BOYNE CITY MI
2016-02-23 231-244-2XXX 2000–2999Assigned ONVOY, LLCV - MI 543C BOYNE CITY MI
2016-02-23 231-437-1XXX 1000–1999Assigned ONVOY, LLCV - MI 543C CHARLEVOIX MI
2016-02-23 231-442-0XXX 0000–0999Assigned ONVOY, LLCV - MI 543C HARRIETTA MI
2016-02-23 231-442-2XXX 2000–2999Assigned ONVOY, LLCV - MI 543C HARRIETTA 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.