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 918
AT&T ENTERPRISES, LLC 60
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
2024-08-12 918-818-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C DELAWARE OK
2024-08-08 918-228-9XXX 9000–9999Assigned AT&T ENTERPRISES, LLC 516C ALLUWE OK
2015-07-17 918-280-0XXX 0000–0999Assigned AT&T ENTERPRISES, LLC 516C TULSA OK
2015-05-21 918-701-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C JENKS OK
2015-05-14 918-490-9XXX 9000–9999Assigned AT&T ENTERPRISES, LLC 516C EUFAULA OK
2015-05-14 918-604-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C PAWHUSKA OK
2015-05-14 918-731-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C DEPEW OK
2015-05-14 918-917-1XXX 1000–1999Assigned AT&T ENTERPRISES, LLC 516C WILBURTON OK
2015-04-15 918-862-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C OILTON OK
2015-03-06 918-358-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C CLEVELAND OK
2015-03-06 918-807-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C BRISTOW OK
2015-03-06 918-916-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C MCALESTER OK
2015-03-06 918-964-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C GROVE OK
2014-11-04 918-861-4XXX 4000–4999Assigned AT&T ENTERPRISES, LLC 516C TULSA OK
2014-04-14 918-992-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C TULSA OK
2013-01-24 918-436-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C POCOLA OK
2012-11-09 918-503-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C MULDROW OK
2011-11-09 918-235-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C SALLISAW OK
2011-11-09 918-285-3XXX 3000–3999Assigned AT&T ENTERPRISES, LLC 516C CUSHING OK
2011-11-09 918-544-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C MIAMI OK
2011-11-09 918-674-6XXX 6000–6999Assigned AT&T ENTERPRISES, LLC 516C QUAPAW OK
2011-11-09 918-675-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C COMMERCE OK
2011-11-09 918-738-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C RALSTON OK
2011-11-09 918-842-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C SOCOFFEYVL OK
2011-11-09 918-848-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C FAIRLAND OK
2011-11-09 918-942-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C TALIHINA OK
2011-11-09 918-962-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C SPIRO OK
2011-10-21 918-383-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C NEW HOME OK
2011-09-13 918-380-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C BRAGGS OK
2011-02-02 918-932-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C TULSA OK
2010-11-04 918-203-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C FORTGIBSON OK
2010-11-04 918-288-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C SPERRY OK
2010-11-04 918-297-4XXX 4000–4999Assigned AT&T ENTERPRISES, LLC 516C HARTSHORNE OK
2010-11-04 918-304-2XXX 2000–2999Assigned AT&T ENTERPRISES, LLC 516C OKMULGEE OK
2010-11-04 918-319-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C HENRYETTA OK
2010-11-04 918-321-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C KIEFER OK
2010-11-04 918-373-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C PRYOR OK
2010-11-04 918-532-3XXX 3000–3999Assigned AT&T ENTERPRISES, LLC 516C COPAN OK
2010-11-04 918-537-2XXX 2000–2999Assigned AT&T ENTERPRISES, LLC 516C MUSKOGEE OK
2010-11-04 918-713-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C VINITA OK
2010-11-04 918-716-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C OKEMAH OK
2010-11-04 918-729-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C DRUMRIGHT OK
2010-11-04 918-762-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C PAWNEE OK
2010-11-04 918-772-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C TAHLEQUAH OK
2010-11-04 918-789-6XXX 6000–6999Assigned AT&T ENTERPRISES, LLC 516C CHELSEA OK
2010-11-04 918-860-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C DEWEY OK
2010-11-04 918-937-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C KETCHUM OK
2010-11-04 918-967-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C STIGLER OK
2009-12-11 918-265-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C BOKOSHE OK
2009-10-16 918-876-6XXX 6000–6999Assigned AT&T ENTERPRISES, LLC 516C BARTLESVL 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.