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 860
LEVEL 3 COMMUNICATIONS, LLC - CT 196
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
2016-04-26 860-200-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 HARTFORD CT
2015-09-14 860-458-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 STAFFD SPG CT
2015-09-14 860-932-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 DANIELSON CT
2015-07-24 860-969-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 HARTFORD CT
2014-10-03 860-398-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 MIDDLETOWN CT
2014-10-03 860-509-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 HARTFORD CT
2014-10-03 860-865-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 NEW LONDON CT
2014-09-24 860-956-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 HARTFORD CT
2014-06-24 860-947-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 HARTFORD CT
2014-06-06 860-393-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 LITCHFIELD CT
2014-06-06 860-592-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 KENT CT
2014-04-29 860-920-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 HARTFORD CT
2014-03-21 860-581-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 ESSEX CT
2014-02-26 860-785-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 HARTFORD CT
2014-02-20 860-237-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 NORWICH CT
2013-10-23 860-956-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 HARTFORD CT
2013-09-04 860-566-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 HARTFORD CT
2012-10-16 860-856-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 HARTFORD CT
2012-08-02 860-717-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 NEWMILFORD CT
2012-08-02 860-764-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 CANTON CT
2012-07-02 860-317-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 PLAINFIELD CT
2012-05-23 860-780-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 GLASTONBY CT
2012-02-23 860-269-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 FARMINGTON CT
2012-02-08 860-492-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 SHARON CT
2012-02-08 860-607-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 WINDSOR CT
2012-02-08 860-618-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 TORRINGTON CT
2012-02-08 860-771-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 WILLIMNTIC CT
2012-01-31 860-552-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 CLINTON CT
2012-01-31 860-554-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 HADDAM CT
2012-01-30 860-709-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 HARTFORD CT
2011-12-29 860-856-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 HARTFORD CT
2011-12-21 860-288-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 MANCHESTER CT
2011-08-03 860-357-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 NEWBRITAIN CT
2011-08-03 860-865-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 NEW LONDON CT
2011-02-11 860-613-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 MIDDLETOWN CT
2010-11-17 860-724-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 HARTFORD CT
2010-11-17 860-724-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 HARTFORD CT
2010-11-11 860-560-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 HARTFORD CT
2010-10-26 860-288-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 MANCHESTER CT
2010-10-26 860-333-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 NEW LONDON CT
2010-05-22 860-920-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 HARTFORD CT
2010-01-07 860-986-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 HARTFORD CT
2009-07-29 860-471-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 HARTFORD CT
2009-06-05 860-245-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 MYSTIC CT
2008-08-01 860-492-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 SHARON CT
2008-07-15 860-333-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 NEW LONDON CT
2008-07-15 860-899-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 HARTFORD CT
2008-05-08 860-607-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 WINDSOR CT
2008-05-07 860-316-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 MIDDLETOWN CT
2008-05-07 860-339-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CT 4800 OLD SAYBRK CT

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.