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 636
CENTURYLINK COMMUNICATIONS, LLC 34
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
2015-03-26 636-999-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J PACIFIC MO
2014-07-14 636-306-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J HERCUMPVLY MO
2014-06-23 636-392-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J WASHINGTON MO
2014-06-23 636-431-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J VALLEYPARK MO
2014-06-23 636-452-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J WARE MO
2014-06-23 636-649-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J UNION MO
2014-06-23 636-888-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ST CLAIR MO
2014-06-20 636-259-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J GRAYSUMMIT MO
2014-06-20 636-429-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J EUREKA MO
2014-06-20 636-495-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J HIGH RIDGE MO
2014-06-20 636-725-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J FSSCRSTLCY MO
2014-06-20 636-797-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J HILLSBORO MO
2014-06-19 636-422-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J POND MO
2014-06-19 636-753-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J PORTAGSIUX MO
2014-06-17 636-551-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CEDAR HILL MO
2014-06-17 636-565-5XXX 5000–5999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J DE SOTO MO
2014-06-17 636-674-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ANTONIA MO
2014-04-07 636-321-1XXX 1000–1999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MAXVILLE MO
2014-04-07 636-717-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J FENTON MO
2014-04-07 636-741-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J IMPERIAL MO
2013-11-01 636-362-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J HARVESTER MO
2013-11-01 636-484-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MANCHESTER MO
2013-11-01 636-723-8XXX 8000–8999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ST CHARLES MO
2013-11-01 636-730-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CHESTERFLD MO
2013-09-20 636-706-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ST PETERS MO
2013-09-17 636-235-5XXX 5000–5999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J WARRENTON MO
2013-09-17 636-264-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J WINFIELD MO
2013-09-17 636-384-4XXX 4000–4999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J WRIGHTCITY MO
2013-09-16 636-242-4XXX 4000–4999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MARTHASVL MO
2013-09-16 636-488-8XXX 8000–8999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J JONESBURG MO
2013-09-16 636-585-3XXX 3000–3999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J HIGH HILL MO
2013-09-13 636-695-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J DARDENNE MO
2013-03-26 636-385-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J OFALLON MO
2012-11-15 636-445-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J WENTZVILLE MO

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.