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 978
TC SYSTEMS, INC. 23
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
2019-03-06 978-780-6XXX 6000–6999Assigned TC SYSTEMS, INC. 7135 ATHOL MA
2018-09-05 978-797-6XXX 6000–6999Assigned TC SYSTEMS, INC. 7135 ROCKPORT MA
2018-09-04 978-286-6XXX 6000–6999Assigned TC SYSTEMS, INC. 7135 STERLING MA
2016-02-01 978-955-3XXX 3000–3999Assigned TC SYSTEMS, INC. 7135 LOWELL MA
2015-12-28 978-783-8XXX 8000–8999Assigned TC SYSTEMS, INC. 7135 ANDOVER MA
2015-12-28 978-783-9XXX 9000–9999Assigned TC SYSTEMS, INC. 7135 ANDOVER MA
2015-04-29 978-898-2XXX 2000–2999Assigned TC SYSTEMS, INC. 7135 NO READING MA
2015-03-31 978-495-8XXX 8000–8999Assigned TC SYSTEMS, INC. 7135 BILLERICA MA
2015-03-31 978-570-3XXX 3000–3999Assigned TC SYSTEMS, INC. 7135 WILMINGTON MA
2015-03-11 978-730-6XXX 6000–6999Assigned TC SYSTEMS, INC. 7135 GARDNER MA
2014-06-27 978-838-5XXX 5000–5999Assigned TC SYSTEMS, INC. 7135 BERLIN MA
2013-08-29 978-313-8XXX 8000–8999Assigned TC SYSTEMS, INC. 7135 BILLERICA MA
2013-04-01 978-653-7XXX 7000–7999Assigned TC SYSTEMS, INC. 7135 HAMILTON MA
2013-03-28 978-320-2XXX 2000–2999Assigned TC SYSTEMS, INC. 7135 WESTFORD MA
2013-01-30 978-435-6XXX 6000–6999Assigned TC SYSTEMS, INC. 7135 BILLERICA MA
2012-11-06 978-313-7XXX 7000–7999Assigned TC SYSTEMS, INC. 7135 BILLERICA MA
2012-02-22 978-313-6XXX 6000–6999Assigned TC SYSTEMS, INC. 7135 BILLERICA MA
2011-09-08 978-942-2XXX 2000–2999Assigned TC SYSTEMS, INC. 7135 LOWELL MA
2011-08-10 978-495-4XXX 4000–4999Assigned TC SYSTEMS, INC. 7135 BILLERICA MA
2011-03-15 978-490-2XXX 2000–2999Assigned TC SYSTEMS, INC. 7135 WESTFORD MA
2010-09-28 978-710-2XXX 2000–2999Assigned TC SYSTEMS, INC. 7135 LOWELL MA
2003-02-03 978-898-4XXX 4000–4999Assigned TC SYSTEMS, INC. 7135 NO READING MA
2002-12-02 978-303-6XXX 6000–6999Assigned TC SYSTEMS, INC. 7135 WESTFORD MA

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.