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 631
TC SYSTEMS, INC. - NY 24
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
2021-10-29 631-970-6XXX 6000–6999Assigned TC SYSTEMS, INC. - NY 7140 MATTITUCK NY
2020-12-10 631-571-6XXX 6000–6999Assigned TC SYSTEMS, INC. - NY 7140 ORIENT NY
2018-09-07 631-607-6XXX 6000–6999Assigned TC SYSTEMS, INC. - NY 7140 WADING RIV NY
2018-02-15 631-378-6XXX 6000–6999Assigned TC SYSTEMS, INC. - NY 7140 SHOREHAM NY
2016-09-23 631-977-3XXX 3000–3999Assigned TC SYSTEMS, INC. - NY 7140 PATCHOGUE NY
2016-09-23 631-977-4XXX 4000–4999Assigned TC SYSTEMS, INC. - NY 7140 PATCHOGUE NY
2016-09-23 631-977-5XXX 5000–5999Assigned TC SYSTEMS, INC. - NY 7140 PATCHOGUE NY
2016-09-23 631-977-6XXX 6000–6999Assigned TC SYSTEMS, INC. - NY 7140 PATCHOGUE NY
2014-06-06 631-296-5XXX 5000–5999Assigned TC SYSTEMS, INC. - NY 7140 BRIDGEMPTN NY
2013-10-09 631-437-6XXX 6000–6999Assigned TC SYSTEMS, INC. - NY 7140 FIREISLAND NY
2012-12-04 631-527-2XXX 2000–2999Assigned TC SYSTEMS, INC. - NY 7140 E HAMPTON NY
2010-04-13 631-887-2XXX 2000–2999Assigned TC SYSTEMS, INC. - NY 7140 HAMPTNBAYS NY
2009-07-15 631-639-3XXX 3000–3999Assigned TC SYSTEMS, INC. - NY 7140 BRENTWOOD NY
2009-01-29 631-639-2XXX 2000–2999Assigned TC SYSTEMS, INC. - NY 7140 BRENTWOOD NY
2006-06-28 631-702-4XXX 4000–4999Assigned TC SYSTEMS, INC. - NY 7140 SOUTHAMPTN NY
2006-06-28 631-808-2XXX 2000–2999Assigned TC SYSTEMS, INC. - NY 7140 SAG HARBOR NY
2006-06-28 631-876-8XXX 8000–8999Assigned TC SYSTEMS, INC. - NY 7140 SOUTHOLD NY
2005-11-30 631-205-7XXX 7000–7999Assigned TC SYSTEMS, INC. - NY 7140 YAPHANK NY
2003-09-30 631-576-3XXX 3000–3999Assigned TC SYSTEMS, INC. - NY 7140 PATCHOGUE NY
2003-06-26 631-739-2XXX 2000–2999Assigned TC SYSTEMS, INC. - NY 7140 RONKONKOMA NY
2002-10-17 631-791-4XXX 4000–4999Assigned TC SYSTEMS, INC. - NY 7140 PTJEFFERSN NY
2002-08-01 631-256-2XXX 2000–2999Assigned TC SYSTEMS, INC. - NY 7140 SAYVILLE NY
2002-08-01 631-406-2XXX 2000–2999Assigned TC SYSTEMS, INC. - NY 7140 SMITHTOWN NY
2002-03-10 631-982-2XXX 2000–2999Assigned TC SYSTEMS, INC. - NY 7140 SMITHTOWN 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.