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
CENTURYLINK COMMUNICATIONS, LLC 29
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
2017-09-25 575-223-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J TRUTHCQNCS NM
2017-05-30 575-221-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J EUNICE NM
2016-07-27 575-489-2XXX 2000–2999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ALAMOGORDO NM
2016-07-18 575-363-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ROSWELL NM
2016-05-16 575-689-4XXX 4000–4999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CARLSBAD NM
2016-05-16 575-942-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J HOBBS NM
2015-06-09 575-459-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SPRINGER NM
2015-06-08 575-440-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J RED RIVER NM
2015-06-08 575-717-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J QUESTA NM
2015-06-02 575-728-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J HATCH NM
2015-05-21 575-332-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SNA TERESA NM
2015-05-21 575-425-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J TAOS NM
2015-05-21 575-468-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J PORTALES NM
2015-05-21 575-518-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SOCORRO NM
2015-05-21 575-590-9XXX 9000–9999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SILVERCITY NM
2015-05-21 575-707-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J RATON NM
2015-05-21 575-815-3XXX 3000–3999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J TUCUMCARI NM
2015-05-20 575-252-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ANGEL FIRE NM
2015-05-20 575-265-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CLOVIS NM
2015-05-20 575-288-4XXX 4000–4999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J LAS CRUCES NM
2015-05-20 575-300-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J LA MESA NM
2015-05-20 575-329-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CANNON AFB NM
2015-05-20 575-376-0XXX 0000–0999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CIMARRON NM
2015-05-20 575-448-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CHAPARRAL NM
2015-05-20 575-567-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J DEMING NM
2015-05-20 575-618-8XXX 8000–8999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ANTHONY NM
2015-05-20 575-655-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J PENASCO NM
2015-05-20 575-810-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ARTESIA NM
2015-05-20 575-912-4XXX 4000–4999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J BAYARD 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.