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 904
AT&T ENTERPRISES, LLC 34
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
2016-11-22 904-907-1XXX 1000–1999Assigned AT&T ENTERPRISES, LLC 516C ST JOHNS FL
2016-09-28 904-801-4XXX 4000–4999Assigned AT&T ENTERPRISES, LLC 516C JACKSONVL FL
2016-08-10 904-222-9XXX 9000–9999Assigned AT&T ENTERPRISES, LLC 516C JACKSOLBCH FL
2016-07-28 904-295-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C ST JOHNS FL
2016-07-13 904-760-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C JACKSONVL FL
2016-05-25 904-719-9XXX 9000–9999Assigned AT&T ENTERPRISES, LLC 516C JACKSONVL FL
2015-09-04 904-417-0XXX 0000–0999Assigned AT&T ENTERPRISES, LLC 516C ST JOHNS FL
2015-06-10 904-559-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C JACKSONVL FL
2015-02-26 904-666-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C JACKSONVL FL
2014-10-30 904-574-9XXX 9000–9999Assigned AT&T ENTERPRISES, LLC 516C JACKSONVL FL
2014-07-30 904-570-9XXX 9000–9999Assigned AT&T ENTERPRISES, LLC 516C JACKSONVL FL
2014-05-19 904-723-1XXX 1000–1999Assigned AT&T ENTERPRISES, LLC 516C JACKSONVL FL
2014-04-28 904-679-4XXX 4000–4999Assigned AT&T ENTERPRISES, LLC 516C ST JOHNS FL
2014-02-13 904-513-4XXX 4000–4999Assigned AT&T ENTERPRISES, LLC 516C JACKSONVL FL
2013-07-16 904-516-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C JACKSONVL FL
2013-06-20 904-602-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C ORANGEPARK FL
2013-01-28 904-679-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C ST JOHNS FL
2012-01-17 904-802-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C JACKSONVL FL
2011-10-31 904-250-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C JACKSONVL FL
2011-09-06 904-203-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C MIDDLEBURG FL
2011-04-04 904-300-3XXX 3000–3999Assigned AT&T ENTERPRISES, LLC 516C JACKSONVL FL
2010-08-19 904-586-2XXX 2000–2999Assigned AT&T ENTERPRISES, LLC 516C JACKSONVL FL
2010-03-25 904-438-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C JACKSONVL FL
2009-12-22 904-474-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C BALDWIN FL
2009-08-03 904-274-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C MAXVILLE FL
2009-02-27 904-548-6XXX 6000–6999Assigned AT&T ENTERPRISES, LLC 516C YULEE FL
2009-02-27 904-657-2XXX 2000–2999Assigned AT&T ENTERPRISES, LLC 516C GREENCVSPG FL
2008-07-28 904-372-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C JACKSOLBCH FL
2008-07-28 904-413-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C MIDDLEBURG FL
2008-07-28 904-436-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C ST JOHNS FL
2008-07-28 904-473-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C PNTVDRABCH FL
2008-07-28 904-592-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C ORANGEPARK FL
2008-07-28 904-624-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C FERNADNBCH FL
2008-07-10 904-672-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C JACKSONVL FL

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.