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 575
LEVEL 3 COMMUNICATIONS, LLC - NM 88
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
2026-04-23 575-350-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - NM 5470 ROY NM
2026-04-09 575-209-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - NM 5470 CHAMA NM
2023-01-25 575-345-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - NM 5470 CANNON AFB NM
2023-01-25 575-599-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - NM 5470 RED RIVER NM
2023-01-25 575-735-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - NM 5470 CIMARRON NM
2021-09-13 575-292-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - NM 5470 TIERRAAMRL NM
2021-09-02 575-320-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - NM 5470 PORTALES NM
2021-02-12 575-429-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - NM 5470 CLAYTON NM
2021-02-12 575-781-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - NM 5470 SANTA ROSA NM
2021-02-12 575-945-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - NM 5470 LOGAN NM
2020-10-08 575-210-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - NM 5470 TUCUMCARI NM
2020-07-29 575-216-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - NM 5470 ANGEL FIRE NM
2019-10-24 575-651-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - NM 5470 RUIDOSODWN NM
2019-02-27 575-988-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - NM 5470 CARLSBAD NM
2018-05-24 575-315-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - NM 5470 RUIDOSO NM
2018-05-24 575-952-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - NM 5470 TRUTHCQNCS NM
2018-05-14 575-400-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - NM 5470 LINDRITH NM
2018-05-14 575-573-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - NM 5470 CRLSBACRNS NM
2018-05-14 575-579-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - NM 5470 HILLSBORO NM
2018-05-14 575-600-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - NM 5470 LYBROOK NM
2017-11-14 575-305-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - NM 5470 SNA TERESA NM
2017-09-25 575-250-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - NM 5470 GALLINA NM
2017-09-25 575-251-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - NM 5470 JAL NM
2017-09-25 575-255-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - NM 5470 SAN YSIDRO NM
2017-09-25 575-414-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - NM 5470 LOVING NM
2017-09-25 575-659-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - NM 5470 LOVINGTON NM
2016-09-20 575-221-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - NM 5470 EUNICE NM
2016-09-20 575-725-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - NM 5470 CARLSBAD NM
2015-08-19 575-288-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - NM 5470 LAS CRUCES NM
2015-08-07 575-888-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - NM 5470 LAS CRUCES NM
2014-09-17 575-288-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - NM 5470 LAS CRUCES NM
2014-06-25 575-602-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - NM 5470 HOBBS NM
2014-03-26 575-449-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - NM 5470 LAS CRUCES NM
2013-12-11 575-265-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - NM 5470 CLOVIS NM
2013-05-23 575-343-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - NM 5470 HATCH NM
2013-04-01 575-201-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - NM 5470 ANTHONY NM
2013-03-27 575-449-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - NM 5470 LAS CRUCES NM
2012-06-14 575-636-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - NM 5470 LAS CRUCES NM
2012-05-09 575-291-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - NM 5470 ROSWELL NM
2012-03-06 575-424-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - NM 5470 VIRDEN NM
2012-02-24 575-263-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - NM 5470 HOBBS NM
2012-01-30 575-587-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - NM 5470 PENASCO NM
2011-08-25 575-268-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - NM 5470 CLOVIS NM
2011-03-25 575-578-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - NM 5470 ROSWELL NM
2008-10-22 575-300-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - NM 5470 LA MESA NM
2008-10-14 575-812-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - NM 5470 ALAMOGORDO NM
2008-09-30 575-208-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - NM 5470 ROSWELL NM
2008-09-30 575-405-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - NM 5470 LAS CRUCES NM
2008-09-30 575-448-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - NM 5470 CHAPARRAL NM
2008-09-30 575-517-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - NM 5470 SOCORRO NM

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.