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 334
AT&T ENTERPRISES, LLC 25
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
2016-05-04 334-694-9XXX 9000–9999Assigned AT&T ENTERPRISES, LLC 516C MONTGOMERY AL
2015-07-09 334-607-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C MARION AL
2015-06-29 334-384-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C PHENIXCITY AL
2015-04-13 334-231-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C UNIONTOWN AL
2013-01-24 334-276-2XXX 2000–2999Assigned AT&T ENTERPRISES, LLC 516C LAFAYETTE AL
2013-01-24 334-377-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C HURTSBORO AL
2012-11-29 334-845-4XXX 4000–4999Assigned AT&T ENTERPRISES, LLC 516C EUFAULA AL
2012-01-19 334-416-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C MONTGOMERY AL
2011-09-16 334-439-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C TUSKEGEE AL
2011-09-16 334-521-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C AUBURN AL
2011-09-16 334-560-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C PHENIXCITY AL
2011-09-16 334-621-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C CLAYTON AL
2011-05-09 334-610-4XXX 4000–4999Assigned AT&T ENTERPRISES, LLC 516C OPELIKA AL
2011-02-08 334-645-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C MAPLESVL AL
2010-10-18 334-212-6XXX 6000–6999Assigned AT&T ENTERPRISES, LLC 516C LINDEN AL
2010-10-18 334-218-2XXX 2000–2999Assigned AT&T ENTERPRISES, LLC 516C GREENSBORO AL
2010-10-18 334-267-4XXX 4000–4999Assigned AT&T ENTERPRISES, LLC 516C SELMA AL
2010-10-18 334-392-6XXX 6000–6999Assigned AT&T ENTERPRISES, LLC 516C FT DEPOSIT AL
2010-10-18 334-478-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C WETUMPKA AL
2010-10-18 334-543-2XXX 2000–2999Assigned AT&T ENTERPRISES, LLC 516C HOLTVILLE AL
2010-10-18 334-568-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C PRATTVILLE AL
2010-10-18 334-635-2XXX 2000–2999Assigned AT&T ENTERPRISES, LLC 516C TROY AL
2010-10-18 334-654-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C DEMOPOLIS AL
2009-12-23 334-564-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C THOMASVL AL
2009-08-18 334-835-4XXX 4000–4999Assigned AT&T ENTERPRISES, LLC 516C OAKLAND AL

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.