NumberResearch Membership · Data 09/21/2026

Recent thousands-block assignments

0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/21/2026

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 646
TC SYSTEMS, INC. - NY 63
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
2024-02-15 646-551-6XXX 6000–6999Assigned TC SYSTEMS, INC. - NY 7140 NWYRCYZN01 NY
2024-02-15 646-551-8XXX 8000–8999Assigned TC SYSTEMS, INC. - NY 7140 NWYRCYZN01 NY
2017-09-27 646-819-5XXX 5000–5999Assigned TC SYSTEMS, INC. - NY 7140 NWYRCYZN01 NY
2017-09-27 646-819-6XXX 6000–6999Assigned TC SYSTEMS, INC. - NY 7140 NWYRCYZN01 NY
2017-09-27 646-819-7XXX 7000–7999Assigned TC SYSTEMS, INC. - NY 7140 NWYRCYZN01 NY
2017-09-27 646-819-8XXX 8000–8999Assigned TC SYSTEMS, INC. - NY 7140 NWYRCYZN01 NY
2017-07-28 646-818-6XXX 6000–6999Assigned TC SYSTEMS, INC. - NY 7140 NWYRCYZN01 NY
2017-07-28 646-818-7XXX 7000–7999Assigned TC SYSTEMS, INC. - NY 7140 NWYRCYZN01 NY
2017-07-28 646-818-8XXX 8000–8999Assigned TC SYSTEMS, INC. - NY 7140 NWYRCYZN01 NY
2017-06-07 646-889-5XXX 5000–5999Assigned TC SYSTEMS, INC. - NY 7140 NWYRCYZN01 NY
2017-06-07 646-889-6XXX 6000–6999Assigned TC SYSTEMS, INC. - NY 7140 NWYRCYZN01 NY
2017-01-27 646-817-9XXX 9000–9999Assigned TC SYSTEMS, INC. - NY 7140 NWYRCYZN01 NY
2016-04-04 646-803-0XXX 0000–0999Assigned TC SYSTEMS, INC. - NY 7140 NWYRCYZN01 NY
2016-04-04 646-803-1XXX 1000–1999Assigned TC SYSTEMS, INC. - NY 7140 NWYRCYZN01 NY
2016-04-04 646-803-2XXX 2000–2999Assigned TC SYSTEMS, INC. - NY 7140 NWYRCYZN01 NY
2016-04-04 646-803-3XXX 3000–3999Assigned TC SYSTEMS, INC. - NY 7140 NWYRCYZN01 NY
2016-04-04 646-803-4XXX 4000–4999Assigned TC SYSTEMS, INC. - NY 7140 NWYRCYZN01 NY
2016-04-04 646-803-5XXX 5000–5999Assigned TC SYSTEMS, INC. - NY 7140 NWYRCYZN01 NY
2016-04-04 646-803-6XXX 6000–6999Assigned TC SYSTEMS, INC. - NY 7140 NWYRCYZN01 NY
2016-04-04 646-803-7XXX 7000–7999Assigned TC SYSTEMS, INC. - NY 7140 NWYRCYZN01 NY
2016-04-04 646-803-8XXX 8000–8999Assigned TC SYSTEMS, INC. - NY 7140 NWYRCYZN01 NY
2016-04-04 646-803-9XXX 9000–9999Assigned TC SYSTEMS, INC. - NY 7140 NWYRCYZN01 NY
2015-12-28 646-804-5XXX 5000–5999Assigned TC SYSTEMS, INC. - NY 7140 NWYRCYZN01 NY
2014-10-10 646-892-1XXX 1000–1999Assigned TC SYSTEMS, INC. - NY 7140 NWYRCYZN01 NY
2014-10-10 646-892-5XXX 5000–5999Assigned TC SYSTEMS, INC. - NY 7140 NWYRCYZN01 NY
2014-09-10 646-874-8XXX 8000–8999Assigned TC SYSTEMS, INC. - NY 7140 NWYRCYZN01 NY
2012-08-14 646-632-6XXX 6000–6999Assigned TC SYSTEMS, INC. - NY 7140 NWYRCYZN01 NY
2012-05-29 646-664-2XXX 2000–2999Assigned TC SYSTEMS, INC. - NY 7140 NWYRCYZN01 NY
2012-05-29 646-664-3XXX 3000–3999Assigned TC SYSTEMS, INC. - NY 7140 NWYRCYZN01 NY
2012-05-29 646-664-8XXX 8000–8999Assigned TC SYSTEMS, INC. - NY 7140 NWYRCYZN01 NY
2012-05-29 646-664-9XXX 9000–9999Assigned TC SYSTEMS, INC. - NY 7140 NWYRCYZN01 NY
2012-05-07 646-561-1XXX 1000–1999Assigned TC SYSTEMS, INC. - NY 7140 NWYRCYZN01 NY
2012-05-07 646-561-7XXX 7000–7999Assigned TC SYSTEMS, INC. - NY 7140 NWYRCYZN01 NY
2009-09-11 646-254-3XXX 3000–3999Assigned TC SYSTEMS, INC. - NY 7140 NWYRCYZN01 NY
2009-09-11 646-416-5XXX 5000–5999Assigned TC SYSTEMS, INC. - NY 7140 NWYRCYZN01 NY
2009-09-11 646-624-5XXX 5000–5999Assigned TC SYSTEMS, INC. - NY 7140 NWYRCYZN01 NY
2009-09-11 646-873-5XXX 5000–5999Assigned TC SYSTEMS, INC. - NY 7140 NWYRCYZN01 NY
2009-05-14 646-500-5XXX 5000–5999Assigned TC SYSTEMS, INC. - NY 7140 NWYRCYZN01 NY
2009-05-14 646-500-6XXX 6000–6999Assigned TC SYSTEMS, INC. - NY 7140 NWYRCYZN01 NY
2009-05-14 646-500-7XXX 7000–7999Assigned TC SYSTEMS, INC. - NY 7140 NWYRCYZN01 NY
2008-07-31 646-482-0XXX 0000–0999Assigned TC SYSTEMS, INC. - NY 7140 NWYRCYZN01 NY
2008-07-31 646-482-1XXX 1000–1999Assigned TC SYSTEMS, INC. - NY 7140 NWYRCYZN01 NY
2008-07-31 646-482-2XXX 2000–2999Assigned TC SYSTEMS, INC. - NY 7140 NWYRCYZN01 NY
2008-07-31 646-482-3XXX 3000–3999Assigned TC SYSTEMS, INC. - NY 7140 NWYRCYZN01 NY
2008-07-31 646-482-4XXX 4000–4999Assigned TC SYSTEMS, INC. - NY 7140 NWYRCYZN01 NY
2008-07-31 646-482-5XXX 5000–5999Assigned TC SYSTEMS, INC. - NY 7140 NWYRCYZN01 NY
2008-07-31 646-482-6XXX 6000–6999Assigned TC SYSTEMS, INC. - NY 7140 NWYRCYZN01 NY
2008-07-31 646-482-7XXX 7000–7999Assigned TC SYSTEMS, INC. - NY 7140 NWYRCYZN01 NY
2008-07-31 646-482-8XXX 8000–8999Assigned TC SYSTEMS, INC. - NY 7140 NWYRCYZN01 NY
2008-07-31 646-482-9XXX 9000–9999Assigned TC SYSTEMS, INC. - NY 7140 NWYRCYZN01 NY

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.