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 575
COMCAST IP PHONE, LLC 28
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
2023-03-30 575-334-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J CHAPARRAL NM
2023-03-21 575-332-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J SNA TERESA NM
2023-02-13 575-867-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J ANTHONY NM
2022-02-24 575-338-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J LA MESA NM
2020-10-09 575-259-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J LAS CRUCES NM
2020-10-09 575-259-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J LAS CRUCES NM
2020-10-09 575-259-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J LAS CRUCES NM
2020-10-09 575-259-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J LAS CRUCES NM
2020-10-09 575-259-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J LAS CRUCES NM
2019-03-29 575-800-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J LAS CRUCES NM
2018-09-07 575-800-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J LAS CRUCES NM
2016-02-25 575-222-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J LAS CRUCES NM
2015-09-29 575-888-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J LAS CRUCES NM
2015-08-27 575-590-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J SILVERCITY NM
2015-08-24 575-222-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J LAS CRUCES NM
2014-11-11 575-288-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J LAS CRUCES NM
2013-10-15 575-449-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J LAS CRUCES NM
2012-10-03 575-571-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J LAS CRUCES NM
2011-08-10 575-323-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J LAS CRUCES NM
2011-07-28 575-224-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J TAOS NM
2011-07-28 575-825-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J PORTALES NM
2011-07-28 575-912-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J BAYARD NM
2011-07-28 575-936-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J DEMING NM
2011-07-28 575-956-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J SILVERCITY NM
2010-06-15 575-652-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J LAS CRUCES NM
2010-06-15 575-652-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J LAS CRUCES NM
2009-10-26 575-267-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J HATCH NM
2009-10-26 575-556-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J LAS CRUCES NM

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.