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 475
COMCAST IP PHONE, LLC 59
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
2025-09-04 475-272-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J FAIRFIELD CT
2025-09-04 475-324-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J TRUMBULL CT
2024-10-02 475-363-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J WESTPORT CT
2024-02-22 475-850-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J NORWALK CT
2023-10-19 475-344-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J BRIDGEPORT CT
2023-10-18 475-832-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J WILTON CT
2023-06-13 475-327-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J MILFORD CT
2023-05-18 475-382-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J BRANFORD CT
2023-05-18 475-382-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J BRANFORD CT
2023-05-18 475-382-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J BRANFORD CT
2023-04-14 475-314-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J HUNTINGTON CT
2023-04-14 475-314-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J HUNTINGTON CT
2023-04-14 475-314-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J HUNTINGTON CT
2022-12-15 475-622-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J WOLCOTT CT
2022-06-13 475-426-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J RIDGEFIELD CT
2022-06-13 475-426-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J RIDGEFIELD CT
2019-08-23 475-522-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J MADISON CT
2019-04-26 475-701-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J NAUGATUCK CT
2019-04-24 475-215-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J RIDGEFIELD CT
2019-04-24 475-253-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J WALLINGFD CT
2019-02-28 475-256-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J DANBURY CT
2018-12-05 475-557-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J WATERBURY CT
2018-11-26 475-269-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J HUNTINGTON CT
2018-11-20 475-701-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J NAUGATUCK CT
2018-10-30 475-254-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J NEW HAVEN CT
2018-10-03 475-701-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J NAUGATUCK CT
2018-08-30 475-241-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J NEW HAVEN CT
2018-05-29 475-300-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J NEW HAVEN CT
2018-04-27 475-234-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J NEW HAVEN CT
2018-04-24 475-237-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J DANBURY CT
2017-11-16 475-234-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J NEW HAVEN CT
2017-10-04 475-775-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J MERIDEN CT
2017-10-03 475-233-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J WATERBURY CT
2017-09-26 475-233-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J WATERBURY CT
2017-09-22 475-338-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J BRANFORD CT
2017-09-08 475-224-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J NEW HAVEN CT
2016-12-30 475-269-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J HUNTINGTON CT
2016-11-08 475-329-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J DANBURY CT
2016-04-25 475-331-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J NEW HAVEN CT
2015-11-10 475-559-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J WATERBURY CT
2015-10-27 475-329-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J DANBURY CT
2015-07-23 475-655-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J NEW HAVEN CT
2015-05-29 475-221-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J BRANFORD CT
2015-03-26 475-441-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J NEW HAVEN CT
2015-03-24 475-777-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J ANSONIDRBY CT
2015-01-30 475-689-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J WATERBURY CT
2014-12-01 475-289-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J DANBURY CT
2014-11-17 475-215-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J RIDGEFIELD CT
2014-08-28 475-238-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J NEW HAVEN CT
2014-08-28 475-675-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J SEYMOUR CT

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.