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 225
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
2024-05-08 225-340-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C WILSON LA
2016-07-28 225-900-6XXX 6000–6999Assigned AT&T ENTERPRISES, LLC 516C BATONROUGE LA
2015-09-01 225-960-3XXX 3000–3999Assigned AT&T ENTERPRISES, LLC 516C BATONROUGE LA
2015-01-08 225-953-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C BATONROUGE LA
2014-08-18 225-380-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C DENHAM SPG LA
2014-08-12 225-421-1XXX 1000–1999Assigned AT&T ENTERPRISES, LLC 516C BATONROUGE LA
2014-03-11 225-412-4XXX 4000–4999Assigned AT&T ENTERPRISES, LLC 516C BATONROUGE LA
2013-06-17 225-349-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C BATONROUGE LA
2012-01-17 225-331-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C CONVENT LA
2012-01-12 225-239-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C BATONROUGE LA
2011-09-23 225-310-4XXX 4000–4999Assigned AT&T ENTERPRISES, LLC 516C JACKSON LA
2011-09-23 225-443-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C ROUGON LA
2011-09-23 225-716-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C WH CASTLE LA
2011-09-08 225-250-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C BATONROUGE LA
2011-02-08 225-452-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C MORGANZA LA
2010-12-14 225-245-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C STFRNCISVL LA
2010-12-14 225-255-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C ST GABRIEL LA
2010-12-14 225-655-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C TUNICA LA
2010-12-14 225-713-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C NEW ROADS LA
2010-10-18 225-874-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C NO CORNOR LA
2010-10-12 225-444-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C BATONROUGE LA
2010-05-27 225-265-6XXX 6000–6999Assigned AT&T ENTERPRISES, LLC 516C VACHERIE LA
2009-12-01 225-417-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C LUTCHER LA
2009-11-09 225-244-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C CLINTON LA
2009-07-20 225-209-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C ALBANY LA
2009-07-20 225-289-2XXX 2000–2999Assigned AT&T ENTERPRISES, LLC 516C DONALDSNVL LA
2009-07-20 225-395-3XXX 3000–3999Assigned AT&T ENTERPRISES, LLC 516C SPRINGFLD LA
2009-07-20 225-435-3XXX 3000–3999Assigned AT&T ENTERPRISES, LLC 516C LIVINGSTON LA
2009-05-04 225-238-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C PLAQUEMINE LA
2009-05-04 225-286-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C ZACHARY LA
2009-05-04 225-369-2XXX 2000–2999Assigned AT&T ENTERPRISES, LLC 516C DENHAM SPG LA
2009-04-23 225-726-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C BATONROUGE LA

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.