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 540
CENTURYLINK COMMUNICATIONS, LLC 58
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
2014-06-26 540-257-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CHRISTISBG VA
2014-06-26 540-307-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J DUBLIN VA
2014-06-26 540-997-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CRAIGSVL VA
2014-06-16 540-227-9XXX 9000–9999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J WASHINGTON VA
2014-06-16 540-253-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J THE PLAINS VA
2014-06-16 540-277-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J BERRYVILLE VA
2014-06-16 540-326-9XXX 9000–9999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MIDDLEBURG VA
2014-06-16 540-356-4XXX 4000–4999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J HARTWOOD VA
2014-06-16 540-388-5XXX 5000–5999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CHANCELLOR VA
2014-06-16 540-402-8XXX 8000–8999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J REMINGTON VA
2014-06-16 540-406-8XXX 8000–8999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J GORDONSVL VA
2014-06-16 540-441-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MT GILEAD VA
2014-06-16 540-469-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J DAHLGREN VA
2014-06-16 540-507-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SPOTSYLVAN VA
2014-06-16 540-508-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J STEPHENSCY VA
2014-06-16 540-543-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MADISON VA
2014-06-16 540-554-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J BLUEMONT VA
2014-06-16 540-592-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J UPPERVILLE VA
2014-06-16 540-603-5XXX 5000–5999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J LOUISA VA
2014-06-16 540-625-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J KINGGEORGE VA
2014-06-16 540-680-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J WARRENTON VA
2014-06-16 540-692-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J FRONTROYAL VA
2014-06-16 540-715-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J UNIONVILLE VA
2014-06-16 540-724-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MARSHALL VA
2014-06-16 540-788-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CALVERTON VA
2014-06-16 540-837-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J BOYCE VA
2014-06-16 540-843-8XXX 8000–8999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J LURAY VA
2014-06-16 540-858-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J GORE VA
2014-06-16 540-882-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CATOCTIN VA
2014-06-16 540-888-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J GAINESBORO VA
2014-06-16 540-895-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J BROKENBURG VA
2014-06-16 540-923-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CRIGLERSVL VA
2014-06-16 540-987-1XXX 1000–1999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SPERRYVL VA
2014-03-25 540-369-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J FREDECKSBG VA
2014-03-25 540-773-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J WINCHESTER VA
2014-02-24 540-485-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CULPEPER VA
2014-01-23 540-268-4XXX 4000–4999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SHAWSVILLE VA
2014-01-23 540-328-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J STONE MT VA
2014-01-23 540-377-8XXX 8000–8999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J RAPHINE VA
2014-01-23 540-404-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SALEM VA
2014-01-23 540-466-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J STAUNTON VA
2014-01-21 540-358-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J NARROWS VA
2014-01-21 540-509-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J PULASKI VA
2014-01-21 540-707-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J BEDFORD VA
2014-01-21 540-750-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J BLACKSBURG VA
2014-01-21 540-787-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J PEARISBURG VA
2014-01-21 540-929-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J BENT MT VA
2014-01-21 540-947-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MONTVALE VA
2013-11-21 540-348-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J BROWNSBURG VA
2013-11-20 540-346-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J FERRUM VA

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.