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 530
COMCAST PHONE OF CALIFORNIA, LLC 74
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
2025-09-26 530-702-7XXX 7000–7999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L WOODLAND CA
2023-05-24 530-954-2XXX 2000–2999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L LIVE OAK CA
2023-03-10 530-975-4XXX 4000–4999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L GRIDLEY CA
2021-06-16 530-298-1XXX 1000–1999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L DAVIS CA
2020-11-16 530-399-7XXX 7000–7999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L CHICO CA
2020-11-16 530-399-8XXX 8000–8999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L CHICO CA
2020-11-16 530-630-2XXX 2000–2999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L CHICO CA
2020-11-16 530-630-3XXX 3000–3999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L CHICO CA
2020-11-16 530-764-4XXX 4000–4999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L OROVILLE CA
2020-11-16 530-783-3XXX 3000–3999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L PARADISE CA
2020-09-20 530-799-3XXX 3000–3999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L MARYSVILLE CA
2020-09-20 530-799-4XXX 4000–4999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L MARYSVILLE CA
2020-07-24 530-334-7XXX 7000–7999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L GEORGETOWN CA
2020-07-24 530-450-8XXX 8000–8999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L AUBN MAIN CA
2019-12-20 530-783-6XXX 6000–6999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L PARADISE CA
2019-08-27 530-499-6XXX 6000–6999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L PLVL WEST CA
2019-07-24 530-399-3XXX 3000–3999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L CHICO CA
2019-04-11 530-619-4XXX 4000–4999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L COLUSA CA
2019-03-04 530-599-8XXX 8000–8999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L MARYSVILLE CA
2019-02-07 530-715-7XXX 7000–7999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L CHICO CA
2018-08-24 530-399-0XXX 0000–0999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L CHICO CA
2018-05-30 530-460-1XXX 1000–1999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L GRVY MAIN CA
2018-02-09 530-854-4XXX 4000–4999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L OROVILLE CA
2017-02-27 530-965-5XXX 5000–5999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L CHICO CA
2016-09-29 530-441-6XXX 6000–6999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L MARYSVILLE CA
2016-09-22 530-762-4XXX 4000–4999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L PARADISE CA
2015-09-24 530-746-5XXX 5000–5999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L DAVIS CA
2015-04-24 530-556-2XXX 2000–2999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SHINGLESPG CA
2015-03-26 530-443-2XXX 2000–2999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L MARYSVILLE CA
2015-02-17 530-497-5XXX 5000–5999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L PLVL WEST CA
2014-12-02 530-955-3XXX 3000–3999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L NEVADACITY CA
2014-08-21 530-487-8XXX 8000–8999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L CHICO CA
2014-05-05 530-762-2XXX 2000–2999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L PARADISE CA
2014-02-28 530-446-6XXX 6000–6999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L GRVY MAIN CA
2014-01-29 530-809-4XXX 4000–4999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L CHICO CA
2013-10-08 530-353-3XXX 3000–3999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L OROVILLE CA
2013-09-06 530-434-6XXX 6000–6999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L MARYSVILLE CA
2013-05-15 530-564-7XXX 7000–7999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L DAVIS CA
2013-01-29 530-774-2XXX 2000–2999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L CHICO CA
2012-12-19 530-748-3XXX 3000–3999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L PLVL WEST CA
2011-09-02 530-592-3XXX 3000–3999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L CHICO CA
2011-08-31 530-777-3XXX 3000–3999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L MARYSVILLE CA
2011-08-11 530-762-0XXX 0000–0999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L PARADISE CA
2011-01-06 530-350-8XXX 8000–8999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SHINGLESPG CA
2010-09-23 530-809-2XXX 2000–2999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L CHICO CA
2010-04-23 530-615-4XXX 4000–4999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L GRVY MAIN CA
2009-10-19 530-503-3XXX 3000–3999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L PLVL SOUTH CA
2008-10-30 530-303-3XXX 3000–3999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L PLVL WEST CA
2008-10-28 530-413-9XXX 9000–9999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L PARADISE CA
2008-10-20 530-636-4XXX 4000–4999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L CHICO CA

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.