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 505
CENTURYLINK COMMUNICATIONS, LLC 39
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
2020-05-06 505-230-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SANTA FE NM
2019-07-31 505-782-1XXX 1000–1999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ZUNI NM
2019-06-21 505-443-0XXX 0000–0999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ALBUQURQUE NM
2019-06-21 505-443-1XXX 1000–1999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ALBUQURQUE NM
2019-06-21 505-443-2XXX 2000–2999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ALBUQURQUE NM
2019-06-21 505-443-3XXX 3000–3999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ALBUQURQUE NM
2019-06-21 505-443-4XXX 4000–4999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ALBUQURQUE NM
2019-06-21 505-443-5XXX 5000–5999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ALBUQURQUE NM
2019-06-21 505-443-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ALBUQURQUE NM
2019-06-21 505-443-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ALBUQURQUE NM
2019-06-21 505-443-8XXX 8000–8999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ALBUQURQUE NM
2019-06-21 505-443-9XXX 9000–9999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ALBUQURQUE NM
2017-04-27 505-551-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J LOS ALAMOS NM
2016-09-21 505-302-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ALBUQURQUE NM
2016-07-05 505-318-3XXX 3000–3999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ALBUQURQUE NM
2016-01-22 505-209-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J GRANTS NM
2016-01-22 505-339-3XXX 3000–3999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J GALLUP NM
2016-01-22 505-636-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J AZTEC NM
2016-01-22 505-675-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J FARMINGTON NM
2016-01-21 505-302-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ALBUQURQUE NM
2016-01-21 505-336-8XXX 8000–8999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ALBUQURQUE NM
2016-01-21 505-337-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ALBUQURQUE NM
2016-01-21 505-375-8XXX 8000–8999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ALBUQURQUE NM
2016-01-21 505-437-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ALBUQURQUE NM
2016-01-21 505-510-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ALBUQURQUE NM
2016-01-21 505-539-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ALBUQURQUE NM
2016-01-21 505-596-8XXX 8000–8999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ALBUQURQUE NM
2016-01-21 505-705-3XXX 3000–3999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ALBUQURQUE NM
2015-05-21 505-303-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SANTA FE NM
2015-05-21 505-309-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J LOS ALAMOS NM
2015-05-21 505-591-2XXX 2000–2999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J VANDERWGON NM
2015-05-21 505-806-5XXX 5000–5999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J RAMAH NM
2015-05-21 505-871-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ZUNI NM
2015-05-20 505-398-9XXX 9000–9999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J LAS VEGAS NM
2015-05-20 505-560-4XXX 4000–4999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J FENCE LAKE NM
2015-05-20 505-594-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J PINE HILL NM
2015-05-20 505-657-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J PECOS NM
2015-05-20 505-709-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J WHITE ROCK NM
2015-04-21 505-313-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ALBUQURQUE 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.