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 585
YMAX COMMUNICATIONS CORP. - NY 28
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
2013-08-06 585-444-7XXX 7000–7999Assigned YMAX COMMUNICATIONS CORP. - NY 282E HENRIETTA NY
2011-05-20 585-310-3XXX 3000–3999Assigned YMAX COMMUNICATIONS CORP. - NY 282E EROCHESTER NY
2011-05-20 585-310-6XXX 6000–6999Assigned YMAX COMMUNICATIONS CORP. - NY 282E EROCHESTER NY
2011-05-20 585-337-6XXX 6000–6999Assigned YMAX COMMUNICATIONS CORP. - NY 282E CANANDAGUA NY
2011-05-20 585-364-6XXX 6000–6999Assigned YMAX COMMUNICATIONS CORP. - NY 282E FAIRPORT NY
2011-05-20 585-444-6XXX 6000–6999Assigned YMAX COMMUNICATIONS CORP. - NY 282E HENRIETTA NY
2011-05-20 585-626-6XXX 6000–6999Assigned YMAX COMMUNICATIONS CORP. - NY 282E WEBSTER NY
2011-05-12 585-633-0XXX 0000–0999Assigned YMAX COMMUNICATIONS CORP. - NY 282E ROCHESTER NY
2011-05-12 585-633-1XXX 1000–1999Assigned YMAX COMMUNICATIONS CORP. - NY 282E ROCHESTER NY
2011-05-12 585-633-2XXX 2000–2999Assigned YMAX COMMUNICATIONS CORP. - NY 282E ROCHESTER NY
2011-05-12 585-633-3XXX 3000–3999Assigned YMAX COMMUNICATIONS CORP. - NY 282E ROCHESTER NY
2011-05-12 585-633-4XXX 4000–4999Assigned YMAX COMMUNICATIONS CORP. - NY 282E ROCHESTER NY
2011-05-12 585-633-5XXX 5000–5999Assigned YMAX COMMUNICATIONS CORP. - NY 282E ROCHESTER NY
2011-05-12 585-633-6XXX 6000–6999Assigned YMAX COMMUNICATIONS CORP. - NY 282E ROCHESTER NY
2010-12-07 585-250-8XXX 8000–8999Assigned YMAX COMMUNICATIONS CORP. - NY 282E BATAVIA NY
2010-12-07 585-250-9XXX 9000–9999Assigned YMAX COMMUNICATIONS CORP. - NY 282E BATAVIA NY
2010-12-07 585-479-6XXX 6000–6999Assigned YMAX COMMUNICATIONS CORP. - NY 282E BATAVIA NY
2009-09-22 585-479-7XXX 7000–7999Assigned YMAX COMMUNICATIONS CORP. - NY 282E BATAVIA NY
2009-09-22 585-479-8XXX 8000–8999Assigned YMAX COMMUNICATIONS CORP. - NY 282E BATAVIA NY
2009-09-22 585-861-1XXX 1000–1999Assigned YMAX COMMUNICATIONS CORP. - NY 282E BATAVIA NY
2009-09-22 585-861-9XXX 9000–9999Assigned YMAX COMMUNICATIONS CORP. - NY 282E BATAVIA NY
2009-01-30 585-300-5XXX 5000–5999Assigned YMAX COMMUNICATIONS CORP. - NY 282E BATAVIA NY
2009-01-30 585-300-6XXX 6000–6999Assigned YMAX COMMUNICATIONS CORP. - NY 282E BATAVIA NY
2009-01-30 585-993-8XXX 8000–8999Assigned YMAX COMMUNICATIONS CORP. - NY 282E BATAVIA NY
2008-05-12 585-861-2XXX 2000–2999Assigned YMAX COMMUNICATIONS CORP. - NY 282E BATAVIA NY
2008-05-12 585-861-3XXX 3000–3999Assigned YMAX COMMUNICATIONS CORP. - NY 282E BATAVIA NY
2008-05-12 585-861-4XXX 4000–4999Assigned YMAX COMMUNICATIONS CORP. - NY 282E BATAVIA NY
2008-05-12 585-861-7XXX 7000–7999Assigned YMAX COMMUNICATIONS CORP. - NY 282E BATAVIA 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.