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 838
TC SYSTEMS, INC. - NY 18
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
2023-05-31 838-257-6XXX 6000–6999Assigned TC SYSTEMS, INC. - NY 7140 ATHENS NY
2023-03-01 838-899-0XXX 0000–0999Assigned TC SYSTEMS, INC. - NY 7140 GREENFLCTR NY
2022-11-14 838-677-4XXX 4000–4999Assigned TC SYSTEMS, INC. - NY 7140 COLONIE NY
2022-06-10 838-207-5XXX 5000–5999Assigned TC SYSTEMS, INC. - NY 7140 ALBANY NY
2022-06-10 838-207-6XXX 6000–6999Assigned TC SYSTEMS, INC. - NY 7140 ALBANY NY
2020-10-26 838-226-6XXX 6000–6999Assigned TC SYSTEMS, INC. - NY 7140 KEESEVILLE NY
2020-04-14 838-216-0XXX 0000–0999Assigned TC SYSTEMS, INC. - NY 7140 ALBANY NY
2020-04-14 838-216-1XXX 1000–1999Assigned TC SYSTEMS, INC. - NY 7140 ALBANY NY
2020-04-14 838-216-2XXX 2000–2999Assigned TC SYSTEMS, INC. - NY 7140 ALBANY NY
2020-04-14 838-216-3XXX 3000–3999Assigned TC SYSTEMS, INC. - NY 7140 ALBANY NY
2020-04-14 838-216-4XXX 4000–4999Assigned TC SYSTEMS, INC. - NY 7140 ALBANY NY
2020-04-14 838-216-5XXX 5000–5999Assigned TC SYSTEMS, INC. - NY 7140 ALBANY NY
2020-04-14 838-216-6XXX 6000–6999Assigned TC SYSTEMS, INC. - NY 7140 ALBANY NY
2020-04-14 838-216-7XXX 7000–7999Assigned TC SYSTEMS, INC. - NY 7140 ALBANY NY
2020-04-14 838-216-8XXX 8000–8999Assigned TC SYSTEMS, INC. - NY 7140 ALBANY NY
2020-04-14 838-216-9XXX 9000–9999Assigned TC SYSTEMS, INC. - NY 7140 ALBANY NY
2019-05-06 838-201-6XXX 6000–6999Assigned TC SYSTEMS, INC. - NY 7140 HOOSICKFLS NY
2018-12-21 838-205-6XXX 6000–6999Assigned TC SYSTEMS, INC. - NY 7140 VALLEY FLS 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.