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 301
CENTURYLINK COMMUNICATIONS, LLC 23
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
2018-02-16 301-578-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J WSHNGTNZN3 MD
2016-12-08 301-746-3XXX 3000–3999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J FRIENDSVL MD
2016-09-26 301-245-9XXX 9000–9999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J BITTINGER MD
2016-09-26 301-453-9XXX 9000–9999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J KITZMILLER MD
2016-09-26 301-895-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J GRANTSVL MD
2016-09-22 301-508-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J MYERSVILLE MD
2016-09-22 301-857-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CLEAR SPG MD
2014-05-27 301-242-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J BRANDYWINE MD
2014-05-27 301-265-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J WSHNGTNZN6 MD
2014-05-27 301-372-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J WSNGTNZN16 MD
2014-05-27 301-438-4XXX 4000–4999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J WSNGTNZN12 MD
2014-05-27 301-804-5XXX 5000–5999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ASHTON236 MD
2014-05-23 301-494-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J WSNG238Z15 MD
2014-05-14 301-246-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J NANJEMOY MD
2014-05-14 301-329-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J ASHTON238 MD
2014-05-14 301-690-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J LEONARDTN MD
2014-05-14 301-691-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J POOLESVL MD
2014-03-05 301-666-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J WSNG236Z14 MD
2013-08-05 301-354-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J WSNGTNZN10 MD
2013-08-05 301-692-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J WSNGTNZN11 MD
2013-08-05 301-844-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J WSHNGTNZN3 MD
2013-08-01 301-569-5XXX 5000–5999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J GAITHERSBG MD
2013-08-01 301-880-8XXX 8000–8999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J LXTNPKGRML MD

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.