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 251
COMCAST IP PHONE, 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
2025-03-20 251-390-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J BAYOUBATRE AL
2025-03-20 251-699-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J IRNGTNSTEL AL
2023-08-23 251-372-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J BELLEFONTN AL
2023-08-23 251-429-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J GRAND BAY AL
2023-08-23 251-462-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J FOWL RIVER AL
2023-08-10 251-383-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J FAIRHOPE AL
2023-03-24 251-240-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J FOLEY AL
2020-11-16 251-313-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J DAUPHIN IS AL
2020-11-12 251-724-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J MOBILE AL
2020-11-12 251-724-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J MOBILE AL
2020-11-12 251-724-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J MOBILE AL
2019-06-05 251-305-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J MOBILE AL
2016-08-02 251-217-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J MOBILE AL
2016-06-23 251-525-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J MOBILE AL
2016-03-31 251-217-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J MOBILE AL
2014-05-19 251-308-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J MOBILE AL
2014-05-19 251-308-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J MOBILE AL
2014-05-08 251-308-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J MOBILE AL
2013-12-03 251-301-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J MOBILE AL
2013-09-06 251-652-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J MOBILE AL
2012-11-26 251-380-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J MOBILE AL
2012-11-26 251-461-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J MOBILE AL
2012-05-09 251-338-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J MOBILE AL
2011-12-29 251-219-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J MOBILE AL
2011-08-30 251-341-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J MOBILE AL
2011-01-20 251-287-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J MOBILE AL
2011-01-20 251-287-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J MOBILE AL
2010-09-02 251-287-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J MOBILE AL
2010-09-02 251-287-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J MOBILE AL
2010-09-02 251-287-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J MOBILE AL
2010-07-16 251-725-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J MOBILE AL
2010-06-07 251-219-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J MOBILE AL
2009-03-19 251-408-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J MOBILE AL
2009-03-19 251-447-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J MOBILE AL
2008-09-05 251-607-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J MOBILE AL
2008-03-17 251-378-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J MOBILE AL
2008-03-17 251-378-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J MOBILE AL
2008-03-04 251-300-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J MOBILE AL
2008-02-15 251-725-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J MOBILE AL
2007-06-29 251-725-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J MOBILE 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.