NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026

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
Clear Download CSV ↓
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 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.