NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026

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 203
YMAX COMMUNICATIONS CORP. - CT 62
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
2011-09-30 203-519-7XXX 7000–7999Assigned YMAX COMMUNICATIONS CORP. - CT 350E WATERBURY CT
2011-09-30 203-519-8XXX 8000–8999Assigned YMAX COMMUNICATIONS CORP. - CT 350E WATERBURY CT
2011-09-30 203-658-3XXX 3000–3999Assigned YMAX COMMUNICATIONS CORP. - CT 350E STAMFORD CT
2011-09-30 203-658-5XXX 5000–5999Assigned YMAX COMMUNICATIONS CORP. - CT 350E STAMFORD CT
2011-09-30 203-684-3XXX 3000–3999Assigned YMAX COMMUNICATIONS CORP. - CT 350E NEW HAVEN CT
2011-09-30 203-684-8XXX 8000–8999Assigned YMAX COMMUNICATIONS CORP. - CT 350E NEW HAVEN CT
2011-09-30 203-726-7XXX 7000–7999Assigned YMAX COMMUNICATIONS CORP. - CT 350E BRIDGEPORT CT
2011-09-30 203-726-8XXX 8000–8999Assigned YMAX COMMUNICATIONS CORP. - CT 350E BRIDGEPORT CT
2011-09-30 203-726-9XXX 9000–9999Assigned YMAX COMMUNICATIONS CORP. - CT 350E BRIDGEPORT CT
2011-09-30 203-820-2XXX 2000–2999Assigned YMAX COMMUNICATIONS CORP. - CT 350E NORWALK CT
2011-09-30 203-826-0XXX 0000–0999Assigned YMAX COMMUNICATIONS CORP. - CT 350E DANBURY CT
2011-09-30 203-826-1XXX 1000–1999Assigned YMAX COMMUNICATIONS CORP. - CT 350E DANBURY CT
2011-09-30 203-842-1XXX 1000–1999Assigned YMAX COMMUNICATIONS CORP. - CT 350E NORWALK CT
2011-06-28 203-717-2XXX 2000–2999Assigned YMAX COMMUNICATIONS CORP. - CT 350E GREENWICH CT
2011-06-28 203-717-3XXX 3000–3999Assigned YMAX COMMUNICATIONS CORP. - CT 350E GREENWICH CT
2011-04-18 203-717-8XXX 8000–8999Assigned YMAX COMMUNICATIONS CORP. - CT 350E GREENWICH CT
2011-02-23 203-302-0XXX 0000–0999Assigned YMAX COMMUNICATIONS CORP. - CT 350E GREENWICH CT
2011-02-23 203-485-2XXX 2000–2999Assigned YMAX COMMUNICATIONS CORP. - CT 350E GREENWICH CT
2011-02-23 203-485-6XXX 6000–6999Assigned YMAX COMMUNICATIONS CORP. - CT 350E GREENWICH CT
2010-10-14 203-422-9XXX 9000–9999Assigned YMAX COMMUNICATIONS CORP. - CT 350E GREENWICH CT
2010-10-14 203-930-0XXX 0000–0999Assigned YMAX COMMUNICATIONS CORP. - CT 350E GREENWICH CT
2010-07-28 203-302-5XXX 5000–5999Assigned YMAX COMMUNICATIONS CORP. - CT 350E GREENWICH CT
2010-07-28 203-769-0XXX 0000–0999Assigned YMAX COMMUNICATIONS CORP. - CT 350E GREENWICH CT
2009-09-02 203-340-3XXX 3000–3999Assigned YMAX COMMUNICATIONS CORP. - CT 350E GREENWICH CT
2009-09-02 203-340-4XXX 4000–4999Assigned YMAX COMMUNICATIONS CORP. - CT 350E GREENWICH CT
2009-09-02 203-340-6XXX 6000–6999Assigned YMAX COMMUNICATIONS CORP. - CT 350E GREENWICH CT
2009-09-02 203-347-6XXX 6000–6999Assigned YMAX COMMUNICATIONS CORP. - CT 350E BYRAM CT
2009-09-02 203-347-8XXX 8000–8999Assigned YMAX COMMUNICATIONS CORP. - CT 350E BYRAM CT
2009-09-02 203-347-9XXX 9000–9999Assigned YMAX COMMUNICATIONS CORP. - CT 350E BYRAM CT
2009-09-02 203-813-0XXX 0000–0999Assigned YMAX COMMUNICATIONS CORP. - CT 350E BYRAM CT
2009-09-02 203-813-2XXX 2000–2999Assigned YMAX COMMUNICATIONS CORP. - CT 350E BYRAM CT
2009-09-02 203-983-0XXX 0000–0999Assigned YMAX COMMUNICATIONS CORP. - CT 350E GREENWICH CT
2009-09-02 203-987-0XXX 0000–0999Assigned YMAX COMMUNICATIONS CORP. - CT 350E GREENWICH CT
2009-01-27 203-347-5XXX 5000–5999Assigned YMAX COMMUNICATIONS CORP. - CT 350E BYRAM CT
2009-01-27 203-681-0XXX 0000–0999Assigned YMAX COMMUNICATIONS CORP. - CT 350E BYRAM CT
2009-01-27 203-681-1XXX 1000–1999Assigned YMAX COMMUNICATIONS CORP. - CT 350E BYRAM CT
2009-01-27 203-681-9XXX 9000–9999Assigned YMAX COMMUNICATIONS CORP. - CT 350E BYRAM CT
2009-01-27 203-813-1XXX 1000–1999Assigned YMAX COMMUNICATIONS CORP. - CT 350E BYRAM CT
2009-01-27 203-930-6XXX 6000–6999Assigned YMAX COMMUNICATIONS CORP. - CT 350E GREENWICH CT
2009-01-27 203-987-2XXX 2000–2999Assigned YMAX COMMUNICATIONS CORP. - CT 350E GREENWICH CT
2009-01-27 203-987-7XXX 7000–7999Assigned YMAX COMMUNICATIONS CORP. - CT 350E GREENWICH CT
2009-01-27 203-992-2XXX 2000–2999Assigned YMAX COMMUNICATIONS CORP. - CT 350E GREENWICH CT
2009-01-27 203-992-5XXX 5000–5999Assigned YMAX COMMUNICATIONS CORP. - CT 350E GREENWICH CT
2009-01-27 203-992-7XXX 7000–7999Assigned YMAX COMMUNICATIONS CORP. - CT 350E GREENWICH CT
2008-12-04 203-983-9XXX 9000–9999Assigned YMAX COMMUNICATIONS CORP. - CT 350E GREENWICH CT
2008-12-04 203-987-9XXX 9000–9999Assigned YMAX COMMUNICATIONS CORP. - CT 350E GREENWICH CT
2008-12-04 203-992-9XXX 9000–9999Assigned YMAX COMMUNICATIONS CORP. - CT 350E GREENWICH CT
2008-09-25 203-681-5XXX 5000–5999Assigned YMAX COMMUNICATIONS CORP. - CT 350E BYRAM CT
2008-09-25 203-681-7XXX 7000–7999Assigned YMAX COMMUNICATIONS CORP. - CT 350E BYRAM CT
2008-09-25 203-813-6XXX 6000–6999Assigned YMAX COMMUNICATIONS CORP. - CT 350E BYRAM CT

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.