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 425
COMCAST IP PHONE, LLC 166
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
2026-03-27 425-461-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J AMES LAKE WA
2020-10-21 425-371-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J BOTHELL WA
2020-10-21 425-371-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J BOTHELL WA
2020-10-21 425-873-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J RENTON WA
2020-10-21 425-873-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J RENTON WA
2020-10-06 425-532-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J BELLEVUE WA
2020-10-02 425-510-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J HALLS LAKE WA
2020-10-02 425-510-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J HALLS LAKE WA
2020-10-02 425-510-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J HALLS LAKE WA
2020-10-02 425-666-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J EVERETT WA
2020-10-02 425-666-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J EVERETT WA
2020-09-02 425-510-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J HALLS LAKE WA
2020-06-30 425-459-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J BELLEVUE WA
2020-06-30 425-625-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J BELLEVUE WA
2019-08-05 425-282-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J RENTON WA
2019-06-05 425-436-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J BELLEVUE WA
2019-06-05 425-480-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J HALLS LAKE WA
2019-06-05 425-491-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J BOTHELL WA
2019-06-05 425-535-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J EVERETT WA
2018-07-03 425-448-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J KIRKLAND WA
2018-06-27 425-528-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J RENTON WA
2017-12-07 425-490-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J FALL CITY WA
2017-11-09 425-382-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J EVERETT WA
2017-09-12 425-362-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J BELLEVUE WA
2016-09-22 425-625-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J BELLEVUE WA
2016-04-12 425-375-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J BOTHELL WA
2016-04-05 425-651-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J ISSAQUAH WA
2016-02-09 425-553-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J KIRKLAND WA
2015-10-29 425-595-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J EVERETT WA
2015-09-24 425-595-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J EVERETT WA
2015-09-03 425-549-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J CARNATION WA
2015-07-31 425-678-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J HALLS LAKE WA
2015-07-24 425-433-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J MAPLE VLY WA
2015-07-09 425-598-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J BELLEVUE WA
2015-04-21 425-595-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J EVERETT WA
2015-03-18 425-363-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J NORTH BEND WA
2014-09-30 425-559-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J BELLEVUE WA
2014-07-31 425-305-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J KIRKLAND WA
2014-07-02 425-219-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J BOTHELL WA
2014-06-20 425-524-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J RENTON WA
2014-06-17 425-678-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J HALLS LAKE WA
2014-06-17 425-967-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J HALLS LAKE WA
2014-06-16 425-395-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J ISSAQUAH WA
2014-06-10 425-921-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J HALLS LAKE WA
2014-05-30 425-326-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J BELLEVUE WA
2014-05-23 425-332-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J SILVERLAKE WA
2013-12-13 425-349-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J EVERETT WA
2013-12-13 425-947-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J KIRKLAND WA
2013-09-25 425-836-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J KIRKLAND WA
2013-09-13 425-245-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J HALLS LAKE WA

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.