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 501
WINDSTREAM COMMUNICATIONS, INC. - AR 38
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
2015-10-06 501-585-3XXX 3000–3999Assigned WINDSTREAM COMMUNICATIONS, INC. - AR 7656 CONWAY AR
2015-10-01 501-585-2XXX 2000–2999Assigned WINDSTREAM COMMUNICATIONS, INC. - AR 7656 CONWAY AR
2015-09-08 501-254-5XXX 5000–5999Assigned WINDSTREAM COMMUNICATIONS, INC. - AR 7656 SEARCY AR
2011-07-06 501-234-1XXX 1000–1999Assigned WINDSTREAM COMMUNICATIONS, INC. - AR 7656 LITTLEROCK AR
2011-07-06 501-234-2XXX 2000–2999Assigned WINDSTREAM COMMUNICATIONS, INC. - AR 7656 LITTLEROCK AR
2011-07-06 501-234-3XXX 3000–3999Assigned WINDSTREAM COMMUNICATIONS, INC. - AR 7656 LITTLEROCK AR
2011-07-06 501-234-4XXX 4000–4999Assigned WINDSTREAM COMMUNICATIONS, INC. - AR 7656 LITTLEROCK AR
2011-07-06 501-234-5XXX 5000–5999Assigned WINDSTREAM COMMUNICATIONS, INC. - AR 7656 LITTLEROCK AR
2011-07-06 501-234-6XXX 6000–6999Assigned WINDSTREAM COMMUNICATIONS, INC. - AR 7656 LITTLEROCK AR
2011-02-09 501-463-5XXX 5000–5999Assigned WINDSTREAM COMMUNICATIONS, INC. - AR 7656 HOTSPRINGS AR
2010-11-24 501-438-6XXX 6000–6999Assigned WINDSTREAM COMMUNICATIONS, INC. - AR 7656 LONOKE AR
2010-04-26 501-448-4XXX 4000–4999Assigned WINDSTREAM COMMUNICATIONS, INC. - AR 7656 FERNDALE AR
2010-01-19 501-448-3XXX 3000–3999Assigned WINDSTREAM COMMUNICATIONS, INC. - AR 7656 FERNDALE AR
2009-09-16 501-932-9XXX 9000–9999Assigned WINDSTREAM COMMUNICATIONS, INC. - AR 7656 CONWAY AR
2009-07-21 501-850-7XXX 7000–7999Assigned WINDSTREAM COMMUNICATIONS, INC. - AR 7656 LITTLEROCK AR
2009-07-21 501-850-8XXX 8000–8999Assigned WINDSTREAM COMMUNICATIONS, INC. - AR 7656 LITTLEROCK AR
2009-06-16 501-897-3XXX 3000–3999Assigned WINDSTREAM COMMUNICATIONS, INC. - AR 7656 WRIGHTSVL AR
2009-04-20 501-850-0XXX 0000–0999Assigned WINDSTREAM COMMUNICATIONS, INC. - AR 7656 LITTLEROCK AR
2008-12-29 501-410-1XXX 1000–1999Assigned WINDSTREAM COMMUNICATIONS, INC. - AR 7656 LITTLEROCK AR
2008-07-21 501-916-3XXX 3000–3999Assigned WINDSTREAM COMMUNICATIONS, INC. - AR 7656 LITTLEROCK AR
2008-07-21 501-916-5XXX 5000–5999Assigned WINDSTREAM COMMUNICATIONS, INC. - AR 7656 LITTLEROCK AR
2008-07-21 501-916-6XXX 6000–6999Assigned WINDSTREAM COMMUNICATIONS, INC. - AR 7656 LITTLEROCK AR
2008-07-21 501-916-8XXX 8000–8999Assigned WINDSTREAM COMMUNICATIONS, INC. - AR 7656 LITTLEROCK AR
2006-07-26 501-492-7XXX 7000–7999Assigned WINDSTREAM COMMUNICATIONS, INC. - AR 7656 LITTLEROCK AR
2006-07-26 501-492-8XXX 8000–8999Assigned WINDSTREAM COMMUNICATIONS, INC. - AR 7656 LITTLEROCK AR
2006-07-06 501-492-2XXX 2000–2999Assigned WINDSTREAM COMMUNICATIONS, INC. - AR 7656 LITTLEROCK AR
2006-07-06 501-492-4XXX 4000–4999Assigned WINDSTREAM COMMUNICATIONS, INC. - AR 7656 LITTLEROCK AR
2006-06-07 501-492-3XXX 3000–3999Assigned WINDSTREAM COMMUNICATIONS, INC. - AR 7656 LITTLEROCK AR
2006-05-11 501-513-8XXX 8000–8999Assigned WINDSTREAM COMMUNICATIONS, INC. - AR 7656 CONWAY AR
2006-05-10 501-492-5XXX 5000–5999Assigned WINDSTREAM COMMUNICATIONS, INC. - AR 7656 LITTLEROCK AR
2006-04-14 501-407-4XXX 4000–4999Assigned WINDSTREAM COMMUNICATIONS, INC. - AR 7656 LITTLEROCK AR
2006-04-14 501-407-5XXX 5000–5999Assigned WINDSTREAM COMMUNICATIONS, INC. - AR 7656 LITTLEROCK AR
2006-02-07 501-748-5XXX 5000–5999Assigned WINDSTREAM COMMUNICATIONS, INC. - AR 7656 LITTLEROCK AR
2006-02-07 501-748-6XXX 6000–6999Assigned WINDSTREAM COMMUNICATIONS, INC. - AR 7656 LITTLEROCK AR
2006-02-07 501-748-7XXX 7000–7999Assigned WINDSTREAM COMMUNICATIONS, INC. - AR 7656 LITTLEROCK AR
2005-02-03 501-326-6XXX 6000–6999Assigned WINDSTREAM COMMUNICATIONS, INC. - AR 7656 BENTON AR
2004-11-02 501-748-8XXX 8000–8999Assigned WINDSTREAM COMMUNICATIONS, INC. - AR 7656 LITTLEROCK AR
2004-11-02 501-748-9XXX 9000–9999Assigned WINDSTREAM COMMUNICATIONS, INC. - AR 7656 LITTLEROCK AR

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.