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 405
AT&T ENTERPRISES, LLC 57
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
2024-08-12 405-299-6XXX 6000–6999Assigned AT&T ENTERPRISES, LLC 516C CALVIN OK
2015-07-09 405-697-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C EDMOND OK
2015-04-15 405-668-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C FORT COBB OK
2015-04-15 405-829-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C CEMENT OK
2015-04-15 405-865-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C CARNEY OK
2015-03-30 405-300-9XXX 9000–9999Assigned AT&T ENTERPRISES, LLC 516C MOORE OK
2015-03-13 405-972-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C BETHANY OK
2015-03-06 405-648-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C ANADARKO OK
2015-02-13 405-839-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C OKLA CITY OK
2014-11-05 405-775-0XXX 0000–0999Assigned AT&T ENTERPRISES, LLC 516C BRITTON OK
2014-07-21 405-578-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C YUKON OK
2014-06-18 405-673-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C OKLA CITY OK
2013-11-26 405-696-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C EDMOND OK
2013-11-26 405-928-4XXX 4000–4999Assigned AT&T ENTERPRISES, LLC 516C NORMAN OK
2013-08-02 405-498-3XXX 3000–3999Assigned AT&T ENTERPRISES, LLC 516C BETHANY OK
2011-10-17 405-810-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C BRITTON OK
2011-08-26 405-336-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C WELEETKA OK
2011-08-15 405-251-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C WYNNEWOOD OK
2011-08-15 405-267-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C BYARS OK
2011-08-15 405-296-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C CROMWELL OK
2011-08-15 405-433-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C CASHION OK
2011-08-15 405-459-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C POCASSET OK
2011-08-15 405-583-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C MULHALL OK
2011-08-15 405-796-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C SPENCER OK
2011-03-22 405-735-1XXX 1000–1999Assigned AT&T ENTERPRISES, LLC 516C MOORE OK
2011-01-18 405-987-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C NICOMAPARK OK
2011-01-06 405-277-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C LUTHER OK
2011-01-06 405-294-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C NOBLE OK
2011-01-06 405-303-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C SEMINOLE OK
2011-01-06 405-332-4XXX 4000–4999Assigned AT&T ENTERPRISES, LLC 516C STILLWATER OK
2011-01-06 405-345-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C EL RENO OK
2011-01-06 405-352-3XXX 3000–3999Assigned AT&T ENTERPRISES, LLC 516C MINCO OK
2011-01-06 405-356-3XXX 3000–3999Assigned AT&T ENTERPRISES, LLC 516C WELLSTON OK
2011-01-06 405-374-3XXX 3000–3999Assigned AT&T ENTERPRISES, LLC 516C MAUD OK
2011-01-06 405-396-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C ARCADIA OK
2011-01-06 405-432-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C SHAWNEE OK
2011-01-06 405-448-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C CHICKASHA OK
2011-01-06 405-452-4XXX 4000–4999Assigned AT&T ENTERPRISES, LLC 516C WETUMKA OK
2011-01-06 405-454-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C HARRAH OK
2011-01-06 405-466-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C GUTHRIE OK
2011-01-06 405-547-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C PERKINS OK
2011-01-06 405-588-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C CHANDLER OK
2011-01-06 405-683-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C WEWOKA OK
2011-01-06 405-687-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C BINGER OK
2011-01-06 405-689-6XXX 6000–6999Assigned AT&T ENTERPRISES, LLC 516C TUTTLE OK
2011-01-06 405-712-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C HOLDENVL OK
2011-01-06 405-926-2XXX 2000–2999Assigned AT&T ENTERPRISES, LLC 516C PAULS VLY OK
2010-04-26 405-657-2XXX 2000–2999Assigned AT&T ENTERPRISES, LLC 516C EDMOND OK
2008-05-12 405-455-6XXX 6000–6999Assigned AT&T ENTERPRISES, LLC 516C MIDWEST CY OK
2006-10-30 405-256-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C MUSTANG OK

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.