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 843
AT&T ENTERPRISES, LLC 35
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
2017-04-06 843-879-6XXX 6000–6999Assigned AT&T ENTERPRISES, LLC 516C SUMMERVL SC
2016-10-14 843-996-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C CHARLESTON SC
2015-09-01 843-872-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C CHARLESTON SC
2015-06-18 843-970-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C SUMMERVL SC
2015-01-20 843-872-6XXX 6000–6999Assigned AT&T ENTERPRISES, LLC 516C CHARLESTON SC
2014-10-07 843-800-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C MTPLEASANT SC
2014-08-05 843-779-0XXX 0000–0999Assigned AT&T ENTERPRISES, LLC 516C CHARLESTON SC
2014-01-22 843-212-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C CHARLESTON SC
2014-01-09 843-900-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C SUMMERVL SC
2013-01-23 843-755-3XXX 3000–3999Assigned AT&T ENTERPRISES, LLC 516C SOCIETY HL SC
2011-10-27 843-501-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C CHARLESTON SC
2011-10-21 843-268-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C LAKE VIEW SC
2011-10-21 843-289-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C MARION SC
2011-10-21 843-306-6XXX 6000–6999Assigned AT&T ENTERPRISES, LLC 516C CLIO SC
2011-10-21 843-400-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C MCCOLL SC
2011-10-21 843-418-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C LATTA SC
2011-10-21 843-420-6XXX 6000–6999Assigned AT&T ENTERPRISES, LLC 516C TIMMONSVL SC
2011-10-21 843-487-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C DILLON SC
2011-10-21 843-561-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C MULLINS SC
2011-10-21 843-595-3XXX 3000–3999Assigned AT&T ENTERPRISES, LLC 516C NICHOLS SC
2011-10-21 843-638-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C ST GEORGE SC
2011-10-21 843-917-2XXX 2000–2999Assigned AT&T ENTERPRISES, LLC 516C HARTSVILLE SC
2011-10-20 843-507-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C NEWTONVL SC
2011-04-27 843-456-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C BENNETTSVL SC
2011-04-27 843-472-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C FLORENCE SC
2011-04-27 843-944-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C DARLINGTON SC
2011-02-09 843-604-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C BLENHEIM SC
2010-04-21 843-865-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C CHERAW SC
2010-03-30 843-631-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C EDISTO IS SC
2010-03-30 843-640-3XXX 3000–3999Assigned AT&T ENTERPRISES, LLC 516C CHARLESTON SC
2010-03-30 843-695-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C SUMMERVL SC
2010-03-30 843-882-3XXX 3000–3999Assigned AT&T ENTERPRISES, LLC 516C SULLIVNSIS SC
2010-03-30 843-885-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C ISLE PALMS SC
2010-03-30 843-972-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C MTPLEASANT SC
2010-02-18 843-648-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C FOLLYBEACH SC

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.