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 956
LEVEL 3 COMMUNICATIONS, LLC - TX 95
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
2022-11-14 956-444-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HARLINGEN TX
2022-11-08 956-679-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 LAREDO TX
2020-05-28 956-452-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 LAREDO TX
2019-05-28 956-234-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 SAN BENITO TX
2018-05-25 956-370-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 RIGRANDECY TX
2017-06-09 956-348-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 EDINBURG TX
2016-10-13 956-609-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 EDINBURG TX
2016-03-30 956-803-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 MCALLEN TX
2016-02-10 956-422-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 ROMA TX
2016-01-28 956-608-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 LAREDO TX
2015-12-29 956-734-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HARLINGEN TX
2015-12-23 956-609-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 EDINBURG TX
2015-11-03 956-619-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 WESLACO TX
2015-07-22 956-331-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 MCALLEN TX
2015-04-16 956-271-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 MISSION TX
2014-09-29 956-688-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 MCALLEN TX
2014-04-25 956-435-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 BROWNSVL TX
2014-04-09 956-365-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HARLINGEN TX
2014-04-09 956-413-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 LAREDO TX
2014-02-11 956-225-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 MCALLEN TX
2013-07-03 956-378-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 EDINBURG TX
2013-06-27 956-340-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 MCALLEN TX
2012-09-07 956-329-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 EDINBURG TX
2012-08-03 956-616-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 MCALLEN TX
2012-08-03 956-621-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 BROWNSVL TX
2012-04-18 956-797-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 LA FERIA TX
2012-03-28 956-329-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 EDINBURG TX
2012-03-07 956-295-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 BROWNSVL TX
2012-02-17 956-255-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 EDCOUCH TX
2011-11-30 956-992-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 MCALLEN TX
2011-11-28 956-329-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 EDINBURG TX
2011-11-17 956-267-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 LAREDO TX
2011-11-16 956-295-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 BROWNSVL TX
2011-07-27 956-402-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 PHARR TX
2011-07-27 956-616-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 MCALLEN TX
2011-05-12 956-329-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 EDINBURG TX
2010-11-09 956-752-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 HARLINGEN TX
2010-11-04 956-587-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 EDINBURG TX
2008-10-13 956-750-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 ZAPATA TX
2008-10-01 956-750-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 ZAPATA TX
2008-09-04 956-750-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 ZAPATA TX
2008-07-17 956-825-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 MERCEDES TX
2008-07-17 956-904-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 PHARR TX
2008-07-15 956-517-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 BROWNSVL TX
2008-07-15 956-517-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 BROWNSVL TX
2008-07-08 956-284-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 LAREDO TX
2008-05-14 956-271-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 MISSION TX
2008-05-05 956-587-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 EDINBURG TX
2008-04-28 956-391-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 MISSION TX
2008-04-28 956-391-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 MISSION 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.