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 614
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
2016-05-20 614-681-9XXX 9000–9999Assigned AT&T ENTERPRISES, LLC 516C WORTHINGTN OH
2016-01-13 614-957-4XXX 4000–4999Assigned AT&T ENTERPRISES, LLC 516C GROVE CITY OH
2015-07-31 614-369-1XXX 1000–1999Assigned AT&T ENTERPRISES, LLC 516C COLUMBUS OH
2015-03-11 614-954-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C ALTON OH
2015-02-17 614-641-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C COLUMBUS OH
2015-02-17 614-845-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C REYNOLDSBG OH
2014-09-02 614-971-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C HILLIARD OH
2014-08-13 614-817-1XXX 1000–1999Assigned AT&T ENTERPRISES, LLC 516C COLUMBUS OH
2014-07-17 614-642-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C WJEFFERSON OH
2014-07-08 614-933-3XXX 3000–3999Assigned AT&T ENTERPRISES, LLC 516C NEW ALBANY OH
2014-04-30 614-532-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C GAHANNA OH
2014-04-03 614-867-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C COLUMBUS OH
2014-01-23 614-776-4XXX 4000–4999Assigned AT&T ENTERPRISES, LLC 516C WESTERVL OH
2013-07-05 614-868-3XXX 3000–3999Assigned AT&T ENTERPRISES, LLC 516C REYNOLDSBG OH
2013-02-22 614-914-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C COLUMBUS OH
2011-11-17 614-547-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C WORTHINGTN OH
2011-09-23 614-686-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C HARRISBURG OH
2011-08-29 614-726-9XXX 9000–9999Assigned AT&T ENTERPRISES, LLC 516C DUBLIN OH
2010-10-18 614-524-6XXX 6000–6999Assigned AT&T ENTERPRISES, LLC 516C CANALWHSTR OH
2010-05-11 614-626-3XXX 3000–3999Assigned AT&T ENTERPRISES, LLC 516C REYNOLDSBG OH
2010-04-26 614-929-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C COLUMBUS OH
2009-10-05 614-654-2XXX 2000–2999Assigned AT&T ENTERPRISES, LLC 516C LOCKBOURNE OH
2006-11-06 614-289-3XXX 3000–3999Assigned AT&T ENTERPRISES, LLC 516C NEW ALBANY OH
2006-06-15 614-423-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C WESTERVL OH
2006-03-13 614-465-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C ALTON OH
2006-03-13 614-567-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C GROVEPORT OH
2006-01-12 614-742-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C HILLIARD OH
2005-08-29 614-553-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C DUBLIN OH
2005-08-02 614-269-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C GAHANNA OH
2005-08-02 614-317-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C GROVE CITY OH
2005-07-27 614-604-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C REYNOLDSBG OH
2005-03-31 614-468-1XXX 1000–1999Assigned AT&T ENTERPRISES, LLC 516C WORTHINGTN 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.