NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

0 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, all time — NPA 231
PAETEC ITEL, LLC 44
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
2013-10-15 231-403-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J WILLIAMSBG MI
2012-06-04 231-642-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J TRAVERSECY MI
2007-11-27 231-486-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J TRAVERSECY MI
2005-12-29 231-242-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J HARBOR SPG MI
2005-12-29 231-354-0XXX 0000–0999Assigned PAETEC ITEL, LLC 829J CORAL MI
2005-12-29 231-388-9XXX 9000–9999Assigned PAETEC ITEL, LLC 829J LE ROY MI
2005-12-29 231-824-2XXX 2000–2999Assigned PAETEC ITEL, LLC 829J MANTON MI
2005-08-24 231-421-2XXX 2000–2999Assigned PAETEC ITEL, LLC 829J TRAVERSECY MI
2004-01-12 231-267-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J WILLIAMSBG MI
2004-01-12 231-432-6XXX 6000–6999Assigned PAETEC ITEL, LLC 829J NORTHPORT MI
2004-01-12 231-436-2XXX 2000–2999Assigned PAETEC ITEL, LLC 829J MACKINAWCY MI
2004-01-12 231-459-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J BOYNE CITY MI
2004-01-12 231-525-1XXX 1000–1999Assigned PAETEC ITEL, LLC 829J WOLVERINE MI
2004-01-12 231-535-8XXX 8000–8999Assigned PAETEC ITEL, LLC 829J WALLOON LK MI
2004-01-12 231-539-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J PELLSTON MI
2004-01-12 231-667-8XXX 8000–8999Assigned PAETEC ITEL, LLC 829J MARION MI
2004-01-12 231-753-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J PETOSKEY MI
2004-01-12 231-791-2XXX 2000–2999Assigned PAETEC ITEL, LLC 829J REED CITY MI
2004-01-12 231-794-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J MANISTEE MI
2004-01-12 231-797-1XXX 1000–1999Assigned PAETEC ITEL, LLC 829J LUTHER MI
2004-01-12 231-824-8XXX 8000–8999Assigned PAETEC ITEL, LLC 829J MANTON MI
2004-01-12 231-825-1XXX 1000–1999Assigned PAETEC ITEL, LLC 829J MCBAIN MI
2004-01-12 231-829-6XXX 6000–6999Assigned PAETEC ITEL, LLC 829J TUSTIN MI
2004-01-12 231-856-2XXX 2000–2999Assigned PAETEC ITEL, LLC 829J MORLEY MI
2004-01-12 231-889-8XXX 8000–8999Assigned PAETEC ITEL, LLC 829J ONEKAMA MI
2004-01-12 231-916-6XXX 6000–6999Assigned PAETEC ITEL, LLC 829J MANCELONA MI
2004-01-12 231-936-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J SCOTTVILLE MI
2003-12-30 231-222-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J EASTJORDAN MI
2003-12-30 231-256-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J LKLEELANAU MI
2003-12-30 231-264-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J ELK RAPIDS MI
2003-12-30 231-276-8XXX 8000–8999Assigned PAETEC ITEL, LLC 829J INTERLOCHN MI
2003-12-30 231-352-1XXX 1000–1999Assigned PAETEC ITEL, LLC 829J FRANKFORT MI
2003-12-30 231-518-8XXX 8000–8999Assigned PAETEC ITEL, LLC 829J KALKASKA MI
2003-12-30 231-577-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J CADILLAC MI
2003-12-30 231-651-8XXX 8000–8999Assigned PAETEC ITEL, LLC 829J BEULAH MI
2003-12-30 231-729-8XXX 8000–8999Assigned PAETEC ITEL, LLC 829J IRONS MI
2003-12-30 231-734-1XXX 1000–1999Assigned PAETEC ITEL, LLC 829J EVART MI
2003-12-30 231-768-8XXX 8000–8999Assigned PAETEC ITEL, LLC 829J LE ROY MI
2003-12-30 231-790-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J FREESOIL MI
2003-12-30 231-844-8XXX 8000–8999Assigned PAETEC ITEL, LLC 829J INDIAN RIV MI
2003-12-30 231-879-2XXX 2000–2999Assigned PAETEC ITEL, LLC 829J FIFE LAKE MI
2003-10-28 231-242-6XXX 6000–6999Assigned PAETEC ITEL, LLC 829J HARBOR SPG MI
2003-10-28 231-668-0XXX 0000–0999Assigned PAETEC ITEL, LLC 829J TRAVERSECY MI
2003-10-27 231-580-0XXX 0000–0999Assigned PAETEC ITEL, LLC 829J BIG RAPIDS 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.