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 205
AT&T ENTERPRISES, LLC 44
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
2016-10-11 205-666-2XXX 2000–2999Assigned AT&T ENTERPRISES, LLC 516C BIRMINGHAM AL
2016-07-01 205-730-9XXX 9000–9999Assigned AT&T ENTERPRISES, LLC 516C BIRMINGHAM AL
2016-06-07 205-997-6XXX 6000–6999Assigned AT&T ENTERPRISES, LLC 516C BESSEMER AL
2016-05-20 205-730-1XXX 1000–1999Assigned AT&T ENTERPRISES, LLC 516C BIRMINGHAM AL
2016-04-06 205-710-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C TUSCALOOSA AL
2015-07-09 205-564-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C ALABASTER AL
2015-05-20 205-900-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C BIRMINGHAM AL
2014-09-22 205-518-6XXX 6000–6999Assigned AT&T ENTERPRISES, LLC 516C BIRMINGHAM AL
2014-07-17 205-632-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C TUSCALOOSA AL
2014-07-10 205-518-0XXX 0000–0999Assigned AT&T ENTERPRISES, LLC 516C BIRMINGHAM AL
2014-04-22 205-582-9XXX 9000–9999Assigned AT&T ENTERPRISES, LLC 516C BIRMINGHAM AL
2014-03-05 205-760-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C BESSEMER AL
2013-07-17 205-703-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C BIRMINGHAM AL
2013-01-03 205-502-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C BIRMINGHAM AL
2012-08-03 205-423-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C BIRMINGHAM AL
2011-09-16 205-291-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C VINCENT AL
2011-09-16 205-340-0XXX 0000–0999Assigned AT&T ENTERPRISES, LLC 516C CENTREVL AL
2011-09-16 205-392-6XXX 6000–6999Assigned AT&T ENTERPRISES, LLC 516C YORK AL
2011-09-16 205-575-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C LIVINGSTON AL
2011-07-15 205-764-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C TUSCALOOSA AL
2011-06-24 205-290-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C BIRMINGHAM AL
2011-06-14 205-626-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C MONTEVALLO AL
2011-03-03 205-433-4XXX 4000–4999Assigned AT&T ENTERPRISES, LLC 516C GRAYSVILLE AL
2011-01-06 205-593-4XXX 4000–4999Assigned AT&T ENTERPRISES, LLC 516C BIRMINGHAM AL
2010-10-05 205-713-9XXX 9000–9999Assigned AT&T ENTERPRISES, LLC 516C CORDOVA AL
2010-10-05 205-724-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C PARRISH AL
2010-10-04 205-346-2XXX 2000–2999Assigned AT&T ENTERPRISES, LLC 516C EUTAW AL
2010-10-04 205-924-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C CARBONHILL AL
2010-07-16 205-538-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C BIRMINGHAM AL
2009-12-23 205-235-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C DORA AL
2009-12-23 205-319-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C CALERA AL
2009-11-10 205-548-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C LINCOLN AL
2009-07-24 205-258-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C CLANTON AL
2009-07-24 205-285-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C GARDENDALE AL
2009-07-24 205-286-4XXX 4000–4999Assigned AT&T ENTERPRISES, LLC 516C W BLOCTON AL
2009-07-24 205-295-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C JASPER AL
2009-07-24 205-406-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C ALABASTER AL
2009-07-24 205-543-4XXX 4000–4999Assigned AT&T ENTERPRISES, LLC 516C WARRIOR AL
2009-07-24 205-565-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C BESSEMER AL
2009-07-24 205-671-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C COLUMBIANA AL
2009-07-24 205-677-4XXX 4000–4999Assigned AT&T ENTERPRISES, LLC 516C CHELSEA AL
2009-07-24 205-687-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C PINSON AL
2009-07-10 205-538-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C BIRMINGHAM AL
2009-07-10 205-737-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C TUSCALOOSA AL

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.