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 959
COMCAST IP PHONE, LLC 22
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
2023-07-05 959-228-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J CORNWALL CT
2023-06-13 959-799-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J TORRINGTON CT
2023-03-13 959-949-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J JEWETTCITY CT
2022-10-03 959-600-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J PLAINFIELD CT
2022-10-03 959-763-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J DANIELSON CT
2022-08-01 959-866-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J CANTON CT
2022-07-28 959-746-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J OLD SAYBRK CT
2022-07-28 959-936-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J LYME CT
2022-06-13 959-227-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J CANAAN CT
2022-06-13 959-716-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J NEW LONDON CT
2022-06-13 959-716-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J NEW LONDON CT
2022-05-31 959-625-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J CLINTON CT
2022-05-31 959-955-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J KILLINGWTH CT
2019-06-18 959-255-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J HARTFORD CT
2019-05-09 959-900-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J HARTFORD CT
2019-02-28 959-213-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J NEW LONDON CT
2019-01-17 959-333-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J HARTFORD CT
2018-11-20 959-201-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J NEW LONDON CT
2017-12-22 959-208-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J NEWBRITAIN CT
2017-11-16 959-265-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J ESSEX CT
2016-11-23 959-230-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J HARTFORD CT
2015-12-10 959-888-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J HARTFORD 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.