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 205
CENTURYLINK COMMUNICATIONS, LLC 40
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
2018-04-25 205-734-4XXX 4000–4999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J BIRMINGHAM AL
2017-11-01 205-452-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SPRINGVL AL
2017-11-01 205-571-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J LEEDS AL
2015-01-08 205-832-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J PARRISH AL
2014-07-18 205-650-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J TUSCALOOSA AL
2014-07-18 205-760-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J BESSEMER AL
2014-05-06 205-740-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CORDOVA AL
2014-03-26 205-779-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ALICEVILLE AL
2014-02-26 205-479-1XXX 1000–1999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CLANTON AL
2014-02-26 205-548-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J LINCOLN AL
2014-02-25 205-235-4XXX 4000–4999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J DORA AL
2014-02-25 205-286-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J W BLOCTON AL
2014-02-25 205-291-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J VINCENT AL
2014-02-25 205-303-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J FAYETTE AL
2014-02-25 205-315-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J EUTAW AL
2014-02-25 205-319-5XXX 5000–5999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CALERA AL
2014-02-25 205-395-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J WINFIELD AL
2014-02-25 205-433-8XXX 8000–8999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J GRAYSVILLE AL
2014-02-25 205-463-4XXX 4000–4999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CARROLLTON AL
2014-02-25 205-528-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J GUIN AL
2014-02-25 205-549-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CARBONHILL AL
2014-02-25 205-564-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ALABASTER AL
2014-02-25 205-575-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J LIVINGSTON AL
2014-02-25 205-670-4XXX 4000–4999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J COLUMBIANA AL
2014-02-25 205-694-8XXX 8000–8999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J GARDENDALE AL
2014-02-25 205-708-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J YORK AL
2014-02-25 205-775-9XXX 9000–9999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CHELSEA AL
2014-02-25 205-928-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CENTREVL AL
2014-02-24 205-430-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J HAMILTON AL
2014-02-24 205-448-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SURFSIDE AL
2014-02-24 205-494-8XXX 8000–8999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J HALEYVILLE AL
2014-02-24 205-508-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J TRUSSVILLE AL
2014-02-24 205-530-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J JASPER AL
2014-02-24 205-557-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J VERNON AL
2014-02-24 205-679-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MONTEVALLO AL
2014-02-24 205-735-8XXX 8000–8999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J WARRIOR AL
2014-02-24 205-810-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J PINSON AL
2014-02-24 205-814-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J PELL CITY AL
2014-02-24 205-828-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J REFORM AL
2013-09-26 205-518-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J BIRMINGHAM AL

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.