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 330
AT&T ENTERPRISES, LLC 32
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
2015-04-14 330-822-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C ROGERS OH
2013-12-26 330-615-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C AKRON OH
2011-12-08 330-851-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C SEBRING OH
2011-12-07 330-805-4XXX 4000–4999Assigned AT&T ENTERPRISES, LLC 516C AKRON OH
2011-08-08 330-271-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C LISBON OH
2011-08-08 330-288-6XXX 6000–6999Assigned AT&T ENTERPRISES, LLC 516C GIRARD OH
2011-08-08 330-362-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C WELLSVILLE OH
2011-08-08 330-366-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C NORTH LIMA OH
2011-08-08 330-368-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C ELIVERPOOL OH
2011-08-08 330-536-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C LOWELLVL OH
2011-08-08 330-568-2XXX 2000–2999Assigned AT&T ENTERPRISES, LLC 516C HUBBARD OH
2011-08-08 330-817-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C LEETONIA OH
2011-08-08 330-846-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C NEWWATERFD OH
2011-08-08 330-886-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C EPALESTINE OH
2011-08-08 330-892-6XXX 6000–6999Assigned AT&T ENTERPRISES, LLC 516C COLUMBIANA OH
2011-08-08 330-969-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C SHARON OH
2010-11-30 330-828-9XXX 9000–9999Assigned AT&T ENTERPRISES, LLC 516C DALTON OH
2010-10-15 330-249-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C ATWATER OH
2010-10-15 330-267-6XXX 6000–6999Assigned AT&T ENTERPRISES, LLC 516C HARTVILLE OH
2010-10-15 330-577-4XXX 4000–4999Assigned AT&T ENTERPRISES, LLC 516C RAVENNA OH
2010-10-15 330-578-3XXX 3000–3999Assigned AT&T ENTERPRISES, LLC 516C ROOTSTOWN OH
2010-10-15 330-595-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C UNIONTOWN OH
2010-10-15 330-790-3XXX 3000–3999Assigned AT&T ENTERPRISES, LLC 516C MOGADORE OH
2010-10-15 330-871-0XXX 0000–0999Assigned AT&T ENTERPRISES, LLC 516C LOUISVILLE OH
2010-10-15 330-917-2XXX 2000–2999Assigned AT&T ENTERPRISES, LLC 516C MARLBORO OH
2010-10-15 330-970-4XXX 4000–4999Assigned AT&T ENTERPRISES, LLC 516C CANALFULTN OH
2009-12-07 330-913-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C ALLIANCE OH
2009-12-03 330-217-1XXX 1000–1999Assigned AT&T ENTERPRISES, LLC 516C AKRON OH
2006-11-08 330-481-4XXX 4000–4999Assigned AT&T ENTERPRISES, LLC 516C MASSILLON OH
2006-03-13 330-474-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C KENT OH
2006-01-12 330-768-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C NO CANTON OH
2005-07-25 330-754-6XXX 6000–6999Assigned AT&T ENTERPRISES, LLC 516C CANTON OH

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.