NumberResearch Membership · Data 09/21/2026

Recent thousands-block assignments

7 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/21/2026

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
2016-02-23 231-803-3XXX 3000–3999Assigned ONVOY, LLCV - MI 543C MORLEY MI
2016-02-23 231-803-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C MORLEY MI
2016-02-19 231-216-7XXX 7000–7999Assigned ONVOY, LLCV - MI 543C FRANKFORT MI
2016-02-19 231-216-8XXX 8000–8999Assigned ONVOY, LLCV - MI 543C FRANKFORT MI
2016-02-19 231-259-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E SHELBY MI
2016-02-19 231-570-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C FIFE LAKE MI
2016-02-19 231-570-9XXX 9000–9999Assigned ONVOY, LLCV - MI 543C FIFE LAKE MI
2016-02-19 231-625-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E CHEBOYGAN MI
2016-02-19 231-674-8XXX 8000–8999Assigned ONVOY, LLCV - MI 543C GRANT MI
2016-02-19 231-834-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C GRANT MI
2016-02-19 231-936-8XXX 8000–8999Assigned ONVOY, LLCV - MI 543C SCOTTVILLE MI
2016-02-19 231-936-9XXX 9000–9999Assigned ONVOY, LLCV - MI 543C SCOTTVILLE MI
2016-02-17 231-489-2XXX 2000–2999Assigned ONVOY, LLCV - MI 543C PETOSKEY MI
2016-02-17 231-489-3XXX 3000–3999Assigned ONVOY, LLCV - MI 543C PETOSKEY MI
2016-02-17 231-624-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C KALKASKA MI
2016-02-17 231-886-3XXX 3000–3999Assigned ONVOY, LLCV - MI 543C KALKASKA MI
2016-02-16 231-292-0XXX 0000–0999Assigned ONVOY, LLCV - MI 543C WHITEHALL MI
2016-02-16 231-292-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C WHITEHALL MI
2016-02-16 231-655-7XXX 7000–7999Assigned ONVOY, LLCV - MI 543C MANISTEE MI
2016-02-16 231-655-8XXX 8000–8999Assigned ONVOY, LLCV - MI 543C MANISTEE MI
2016-02-12 231-259-1XXX 1000–1999Assigned ONVOY, LLCV - MI 543C SHELBY MI
2016-02-12 231-259-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 7157 SHELBY MI
2016-02-12 231-259-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C SHELBY MI
2016-02-12 231-408-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C BIG RAPIDS MI
2016-02-12 231-408-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C BIG RAPIDS MI
2016-02-12 231-447-0XXX 0000–0999Assigned ONVOY, LLCV - MI 543C HOLTON MI
2016-02-12 231-447-3XXX 3000–3999Assigned ONVOY, LLCV - MI 543C HOLTON MI
2016-02-12 231-465-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 7157 REED CITY MI
2016-02-12 231-533-1XXX 1000–1999Assigned ONVOY, LLCV - MI 543C BELLAIRE MI
2016-02-12 231-625-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C CHEBOYGAN MI
2016-02-12 231-625-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C CHEBOYGAN MI
2016-02-12 231-888-0XXX 0000–0999Assigned ONVOY, LLCV - MI 543C TWIN LAKE MI
2016-02-12 231-888-1XXX 1000–1999Assigned ONVOY, LLCV - MI 543C TWIN LAKE MI
2016-02-10 231-244-0XXX 0000–0999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G BOYNE CITY MI
2016-02-10 231-444-1XXX 1000–1999Assigned ONVOY, LLCV - MI 543C CADILLAC MI
2016-02-10 231-444-2XXX 2000–2999Assigned ONVOY, LLCV - MI 543C CADILLAC MI
2016-02-03 231-360-2XXX 2000–2999Assigned ONVOY, LLCV - MI 543C TRAVERSECY MI
2016-02-03 231-715-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C TRAVERSECY MI
2016-01-26 231-538-2XXX 2000–2999Assigned ONVOY, LLCV - MI 543C FREMONT MI
2016-01-26 231-538-3XXX 3000–3999Assigned ONVOY, LLCV - MI 543C FREMONT MI
2016-01-11 231-292-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WHITEHALL MI
2015-12-24 231-259-2XXX 2000–2999Assigned 123.NET, LLC 2550 SHELBY MI
2015-12-23 231-246-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J MUSKEGON MI
2015-12-08 231-234-1XXX 1000–1999Assigned CHARTER IP ENABLED SERVICES, LLC 792K BUCKLEY MI
2015-12-08 231-251-1XXX 1000–1999Assigned PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G LKLEELANAU MI
2015-12-08 231-447-1XXX 1000–1999Assigned ONVOY, LLCV - MI 543C HOLTON MI
2015-12-08 231-447-2XXX 2000–2999Assigned ONVOY, LLCV - MI 543C HOLTON MI
2015-12-07 231-599-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C EASTPORT MI
2015-12-07 231-599-9XXX 9000–9999Assigned ONVOY, LLCV - MI 543C EASTPORT MI
2015-12-07 231-638-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C MUSKEGON MI

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.