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 209
COMCAST PHONE OF CALIFORNIA, LLC 130
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
2021-07-06 209-717-1XXX 1000–1999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L MANTECA CA
2021-07-06 209-717-2XXX 2000–2999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L MANTECA CA
2020-09-22 209-792-5XXX 5000–5999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L STOCKTON CA
2020-09-22 209-792-6XXX 6000–6999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L STOCKTON CA
2020-09-22 209-792-7XXX 7000–7999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L STOCKTON CA
2020-09-22 209-792-8XXX 8000–8999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L STOCKTON CA
2020-09-22 209-792-9XXX 9000–9999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L STOCKTON CA
2020-09-22 209-859-5XXX 5000–5999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L MODESTO CA
2020-09-22 209-859-6XXX 6000–6999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L MODESTO CA
2020-09-22 209-859-7XXX 7000–7999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L MODESTO CA
2020-09-22 209-859-8XXX 8000–8999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L MODESTO CA
2020-09-22 209-859-9XXX 9000–9999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L MODESTO CA
2020-09-20 209-749-1XXX 1000–1999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L MERCED CA
2020-09-20 209-749-2XXX 2000–2999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L MERCED CA
2020-09-18 209-699-1XXX 1000–1999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L TRACY CA
2020-09-18 209-699-3XXX 3000–3999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L TRACY CA
2020-09-18 209-699-4XXX 4000–4999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L TRACY CA
2019-10-07 209-399-2XXX 2000–2999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L MANTECA CA
2019-08-30 209-618-4XXX 4000–4999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L MODESTO CA
2019-03-04 209-279-1XXX 1000–1999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L STOCKTON CA
2019-03-04 209-310-6XXX 6000–6999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L LODI CA
2018-11-20 209-455-3XXX 3000–3999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L MERCED CA
2018-11-01 209-310-2XXX 2000–2999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L LODI CA
2018-10-08 209-307-6XXX 6000–6999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L STOCKTON CA
2018-08-30 209-488-4XXX 4000–4999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L MODESTO CA
2018-05-02 209-395-3XXX 3000–3999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L STOCKTON CA
2017-12-29 209-396-1XXX 1000–1999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SNRA MAIN CA
2017-09-20 209-237-2XXX 2000–2999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L TRACY CA
2017-04-05 209-762-3XXX 3000–3999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L STOCKTON CA
2016-11-16 209-360-2XXX 2000–2999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L MODESTO CA
2016-10-19 209-490-4XXX 4000–4999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L STOCKTON CA
2016-09-08 209-707-3XXX 3000–3999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L MANTECA CA
2015-10-30 209-422-6XXX 6000–6999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L MODESTO CA
2015-10-30 209-426-5XXX 5000–5999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L LODI CA
2015-08-20 209-635-5XXX 5000–5999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L ATWATER CA
2015-07-16 209-772-4XXX 4000–4999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L VALLEY SPG CA
2015-07-15 209-328-1XXX 1000–1999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L MANTECA CA
2015-06-23 209-636-4XXX 4000–4999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L STOCKTON CA
2015-04-02 209-822-3XXX 3000–3999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L ANGELSCAMP CA
2015-03-30 209-764-3XXX 3000–3999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L OAKDALE CA
2015-03-24 209-422-3XXX 3000–3999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L MODESTO CA
2015-03-09 209-843-5XXX 5000–5999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L GALT CA
2014-09-22 209-650-6XXX 6000–6999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L TRACY CA
2014-07-02 209-694-3XXX 3000–3999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SNRA MAIN CA
2014-06-17 209-851-2XXX 2000–2999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L STOCKTON CA
2014-06-17 209-851-3XXX 3000–3999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L STOCKTON CA
2014-06-05 209-647-2XXX 2000–2999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L MANTECA CA
2014-05-23 209-857-5XXX 5000–5999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L MODESTO CA
2014-04-22 209-325-4XXX 4000–4999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L MERCED CA
2013-10-31 209-400-7XXX 7000–7999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L LODI 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.