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 262
AT&T ENTERPRISES, LLC 36
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
2016-06-24 262-583-3XXX 3000–3999Assigned AT&T ENTERPRISES, LLC 516C RACINE WI
2014-09-26 262-875-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C WAUKESHA WI
2014-08-05 262-505-6XXX 6000–6999Assigned AT&T ENTERPRISES, LLC 516C MILWAUKZN2 WI
2013-07-09 262-800-3XXX 3000–3999Assigned AT&T ENTERPRISES, LLC 516C RACINE WI
2013-01-23 262-749-3XXX 3000–3999Assigned AT&T ENTERPRISES, LLC 516C DELAVAN WI
2012-11-07 262-864-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C UNIONGROVE WI
2012-01-13 262-564-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C KENOSHA WI
2011-12-27 262-425-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C SOMERS WI
2011-12-05 262-753-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C WHITEWATER WI
2011-12-05 262-971-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C MUSKEGO WI
2011-11-14 262-396-2XXX 2000–2999Assigned AT&T ENTERPRISES, LLC 516C NO ANTIOCH WI
2011-11-14 262-824-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C CALEDONIA WI
2011-05-20 262-295-4XXX 4000–4999Assigned AT&T ENTERPRISES, LLC 516C GENOA CITY WI
2011-05-20 262-685-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C NEWBURG WI
2011-05-20 262-686-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C WILLIAMSBY WI
2011-05-20 262-812-4XXX 4000–4999Assigned AT&T ENTERPRISES, LLC 516C LAKEGENEVA WI
2011-05-20 262-922-0XXX 0000–0999Assigned AT&T ENTERPRISES, LLC 516C BIG BEND WI
2009-10-06 262-328-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C HUBERTUS WI
2009-10-06 262-342-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C BURLINGTON WI
2007-08-09 262-261-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C PTWASHIGTN WI
2006-10-17 262-423-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C JACKSON WI
2006-10-17 262-457-3XXX 3000–3999Assigned AT&T ENTERPRISES, LLC 516C HARTFORD WI
2006-10-17 262-932-4XXX 4000–4999Assigned AT&T ENTERPRISES, LLC 516C SUSSEX WI
2006-06-09 262-349-4XXX 4000–4999Assigned AT&T ENTERPRISES, LLC 516C WAUKESHA WI
2006-06-08 262-456-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C RACINE WI
2006-03-29 262-204-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C CEDARBURG WI
2006-03-29 262-292-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C THIENSVL WI
2006-03-29 262-324-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C PARKSIDE WI
2006-03-29 262-326-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C NORTH LAKE WI
2006-03-29 262-346-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C WEST BEND WI
2006-03-29 262-354-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C OCONOMOWOC WI
2006-03-29 262-361-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C HARTLAND WI
2006-03-29 262-528-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C MERTON WI
2006-03-29 262-696-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C PEWAUKEE WI
2005-07-27 262-794-3XXX 3000–3999Assigned AT&T ENTERPRISES, LLC 516C MILWAUKZN2 WI
2005-05-03 262-415-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C MENOMONFLS WI

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.