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 617
COMCAST IP PHONE, LLC 97
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
2022-09-27 617-395-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J CAMBRIDGE MA
2019-04-10 617-466-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J CHELSEA MA
2018-11-15 617-485-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J NEWTON MA
2018-02-19 617-404-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J QUINCY MA
2016-12-08 617-377-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J BOSTON MA
2016-11-18 617-665-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J CAMBRIDGE MA
2014-12-12 617-845-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J QUINCY MA
2014-08-12 617-530-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J BOSTON MA
2014-03-12 617-928-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J NEWTON MA
2014-03-05 617-996-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J SOMERVILLE MA
2014-01-10 617-766-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J SO BOSTON MA
2013-09-18 617-286-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J CHARLESTN MA
2013-09-18 617-870-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J BRIGHTON MA
2013-08-15 617-481-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J QUINCY MA
2013-08-15 617-944-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J EVERETT MA
2013-07-22 617-505-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J BROOKLINE MA
2013-07-11 617-982-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J BOSTON MA
2013-07-11 617-982-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J BOSTON MA
2013-06-20 617-294-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J EVERETT MA
2013-06-10 617-481-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J QUINCY MA
2013-05-06 617-932-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J BELMONT MA
2013-01-23 617-207-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J WINTHROP MA
2013-01-09 617-936-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J BOSTON MA
2013-01-09 617-936-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J BOSTON MA
2013-01-07 617-238-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J ROXBURY MA
2012-12-06 617-514-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J DORCHESTER MA
2012-10-26 617-764-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J SOMERVILLE MA
2012-09-21 617-481-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J QUINCY MA
2012-09-13 617-208-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J BRIGHTON MA
2012-09-07 617-326-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J DORCHESTER MA
2012-09-07 617-396-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J BROOKLINE MA
2012-06-26 617-272-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J HYDE PARK MA
2012-06-11 617-942-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J JAMAICA PL MA
2012-06-08 617-322-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J MILTON MA
2012-04-26 617-765-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J SO BOSTON MA
2011-08-31 617-481-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J QUINCY MA
2011-08-29 617-553-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J JAMAICA PL MA
2011-08-11 617-580-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J CHARLESTN MA
2011-07-13 617-860-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J BROOKLINE MA
2010-09-10 617-608-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J BROOKLINE MA
2010-09-03 617-294-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J EVERETT MA
2010-08-26 617-764-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J SOMERVILLE MA
2009-03-17 617-652-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J ROXBURY MA
2009-02-20 617-506-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J DORCHESTER MA
2009-02-20 617-942-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J JAMAICA PL MA
2008-08-13 617-409-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J CHELSEA MA
2008-08-04 617-405-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J QUINCY MA
2008-03-04 617-874-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J EASTBOSTON MA
2008-02-26 617-514-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J DORCHESTER MA
2008-02-26 617-514-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J DORCHESTER MA

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.