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 816
AT&T ENTERPRISES, LLC 32
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
2023-09-06 816-851-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C SANANTONIO MO
2016-05-11 816-642-9XXX 9000–9999Assigned AT&T ENTERPRISES, LLC 516C KANSASCITY MO
2015-08-24 816-208-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C LEAVEHLSNG MO
2015-04-16 816-844-9XXX 9000–9999Assigned AT&T ENTERPRISES, LLC 516C KANSASCITY MO
2015-02-04 816-598-1XXX 1000–1999Assigned AT&T ENTERPRISES, LLC 516C BLUE SPG MO
2015-01-08 816-656-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C KANSASCITY MO
2014-09-26 816-492-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C KANSASCITY MO
2014-09-23 816-535-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C BELTON MO
2014-09-12 816-944-4XXX 4000–4999Assigned AT&T ENTERPRISES, LLC 516C LEESSUMMIT MO
2014-03-04 816-859-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C KANSASCITY MO
2012-01-26 816-982-9XXX 9000–9999Assigned AT&T ENTERPRISES, LLC 516C KANSASCITY MO
2011-11-02 816-439-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C LIBERTY MO
2011-11-02 816-832-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C KANSASCITY MO
2011-09-30 816-615-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C RICHMOND MO
2011-05-20 816-273-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C ST JOSEPH MO
2011-05-20 816-338-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C AGENCY MO
2011-05-20 816-670-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C ARCHIE MO
2011-05-20 816-685-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C DE KALB MO
2011-05-20 816-688-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C RUSHVILLE MO
2011-05-20 816-754-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C E ATCHISON MO
2011-05-20 816-848-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C EXCELSRSPG MO
2010-10-19 816-701-6XXX 6000–6999Assigned AT&T ENTERPRISES, LLC 516C KANSASCITY MO
2009-12-14 816-239-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C ADRIAN MO
2009-12-09 816-503-6XXX 6000–6999Assigned AT&T ENTERPRISES, LLC 516C KANSASCITY MO
2007-08-10 816-427-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C BLUE SPG MO
2007-08-10 816-733-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C FARLEY MO
2007-08-10 816-867-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C GRAIN VLY MO
2006-10-17 816-343-2XXX 2000–2999Assigned AT&T ENTERPRISES, LLC 516C SMITHVILLE MO
2006-06-06 816-388-3XXX 3000–3999Assigned AT&T ENTERPRISES, LLC 516C BELTON MO
2006-03-13 816-434-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C LEESSUMMIT MO
2006-03-13 816-537-3XXX 3000–3999Assigned AT&T ENTERPRISES, LLC 516C GREENWOOD MO
2006-03-13 816-883-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C LIBERTY MO

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.