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 915
LEVEL 3 COMMUNICATIONS, LLC - TX 67
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
2021-12-08 915-289-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 EL PASO TX
2021-07-07 915-895-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 EL PASO TX
2021-03-18 915-273-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 EL PASO TX
2020-11-23 915-237-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 VINTON TX
2019-05-01 915-671-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 CANUTILLO TX
2018-05-10 915-200-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 EL PASO TX
2018-05-10 915-808-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 EL PASO TX
2017-08-31 915-283-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 EL PASO TX
2017-07-12 915-444-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 EL PASO TX
2017-01-18 915-263-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 EL PASO TX
2016-09-13 915-671-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 CANUTILLO TX
2016-03-03 915-271-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 EL PASO TX
2015-08-25 915-315-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 EL PASO TX
2015-08-13 915-845-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 EL PASO TX
2015-07-15 915-706-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 EL PASO TX
2015-05-06 915-218-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 EL PASO TX
2015-03-20 915-765-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 FABENS TX
2015-03-13 915-218-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 EL PASO TX
2015-01-28 915-267-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 CLINT TX
2014-07-01 915-260-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 EL PASO TX
2014-07-01 915-260-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 EL PASO TX
2014-03-25 915-213-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 EL PASO TX
2013-12-04 915-701-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 EL PASO TX
2013-10-17 915-228-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 EL PASO TX
2013-05-30 915-206-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 EL PASO TX
2013-05-30 915-206-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 EL PASO TX
2012-11-12 915-600-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 EL PASO TX
2012-11-12 915-600-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 EL PASO TX
2012-10-12 915-493-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 EL PASO TX
2012-06-05 915-245-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 EL PASO TX
2012-06-05 915-974-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 CLINT TX
2011-11-11 915-209-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 CLINT TX
2011-05-05 915-209-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 CLINT TX
2011-02-15 915-493-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 EL PASO TX
2011-02-15 915-493-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 EL PASO TX
2010-11-18 915-249-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 EL PASO TX
2010-11-18 915-249-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 EL PASO TX
2010-11-18 915-249-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 EL PASO TX
2010-11-05 915-881-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 EL PASO TX
2010-10-27 915-209-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 CLINT TX
2010-05-24 915-248-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 EL PASO TX
2009-12-29 915-317-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 EL PASO TX
2009-09-23 915-317-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 EL PASO TX
2008-07-08 915-503-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 EL PASO TX
2008-07-08 915-503-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 EL PASO TX
2008-02-01 915-208-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 EL PASO TX
2008-02-01 915-288-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 CLINT TX
2007-11-26 915-799-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 EL PASO TX
2007-07-16 915-219-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 EL PASO TX
2007-07-16 915-219-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - TX 6114 EL PASO 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.