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 936
LEVEL 3 COMMUNICATIONS, LLC - TX 82
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
2023-06-08 936-268-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 LIVINGSTON TX
2021-12-21 936-302-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 GARRISON TX
2021-12-21 936-810-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 TIMPSON TX
2021-06-14 936-308-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 DIBOLL TX
2021-01-25 936-877-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 ALTO TX
2020-06-16 936-312-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 GRAPELAND TX
2019-04-08 936-290-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 CONROE TX
2019-04-08 936-290-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 CONROE TX
2019-04-08 936-290-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 CONROE TX
2019-04-08 936-290-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 CONROE TX
2019-04-08 936-290-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 CONROE TX
2019-02-11 936-243-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 CROCKETT TX
2018-05-30 936-679-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 SANAUGUSTN TX
2018-05-29 936-276-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 MONTGOMERY TX
2018-05-25 936-306-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 NAVASOTA TX
2018-02-01 936-282-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 CONROE TX
2018-02-01 936-282-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 CONROE TX
2018-02-01 936-282-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 CONROE TX
2018-02-01 936-282-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 CONROE TX
2018-02-01 936-282-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 CONROE TX
2017-12-14 936-227-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 CUSHING TX
2016-03-09 936-994-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HUNTSVILLE TX
2015-12-29 936-270-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 CONROE TX
2015-12-16 936-681-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 DAYTON TX
2015-07-22 936-270-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 CONROE TX
2015-05-08 936-571-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 ANDERSON TX
2015-05-06 936-235-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 CONROE TX
2015-04-21 936-851-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 RICHARDS TX
2015-04-21 936-874-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 SHIRO TX
2015-04-21 936-878-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 WASHINGTON TX
2015-04-02 936-236-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 PLANTERSVL TX
2015-02-18 936-235-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 CONROE TX
2015-01-28 936-999-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 ZAVALLA TX
2015-01-07 936-585-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 NACOGDOCHS TX
2014-09-16 936-238-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 LUFKIN TX
2014-07-02 936-703-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 CONROE TX
2013-07-03 936-206-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 CONROE TX
2013-03-07 936-241-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 MADISONVL TX
2012-12-14 936-229-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 LUFKIN TX
2012-12-14 936-755-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HUNTSVILLE TX
2012-11-12 936-657-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 CENTER TX
2012-10-04 936-585-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 NACOGDOCHS TX
2012-08-03 936-202-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 CONROE TX
2012-03-21 936-242-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 CONROE TX
2012-03-13 936-342-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 SARATOGA TX
2012-03-13 936-495-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 BROADDUS TX
2012-03-13 936-909-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 PENNINGTON TX
2011-12-23 936-483-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 SHEPHERD TX
2011-11-30 936-463-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 WALLER TX
2011-10-21 936-229-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 LUFKIN TX

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.