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 219
AT&T ENTERPRISES, LLC 18
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
2015-02-04 219-281-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C CROWNPOINT IN
2015-01-15 219-501-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C HAMMOND IN
2014-07-09 219-301-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C HIGHLAND IN
2013-10-25 219-702-4XXX 4000–4999Assigned AT&T ENTERPRISES, LLC 516C GARY IN
2011-05-20 219-225-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C LOWELL IN
2011-05-20 219-370-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C WHITING IN
2011-05-20 219-374-0XXX 0000–0999Assigned AT&T ENTERPRISES, LLC 516C CEDAR LAKE IN
2011-05-20 219-506-4XXX 4000–4999Assigned AT&T ENTERPRISES, LLC 516C MOROCCO IN
2011-05-20 219-525-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C MERRILLVL IN
2011-05-20 219-992-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C LAKE VLG IN
2010-10-07 219-262-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C MICHIGANCY IN
2008-09-11 219-256-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C E CHICAGO IN
2008-09-11 219-627-4XXX 4000–4999Assigned AT&T ENTERPRISES, LLC 516C ST JOHN IN
2006-06-19 219-487-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C GARY IN
2006-06-19 219-803-2XXX 2000–2999Assigned AT&T ENTERPRISES, LLC 516C HAMMOND IN
2006-03-06 219-226-4XXX 4000–4999Assigned AT&T ENTERPRISES, LLC 516C CROWNPOINT IN
2006-03-06 219-227-9XXX 9000–9999Assigned AT&T ENTERPRISES, LLC 516C DYER IN
2006-03-06 219-513-6XXX 6000–6999Assigned AT&T ENTERPRISES, LLC 516C HIGHLAND IN

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.