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 603
IDT AMERICA, CORP. - NH 34
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
2023-03-31 603-565-3XXX 3000–3999Assigned IDT AMERICA, CORP. - NH 314C PENACOOK NH
2023-02-21 603-814-6XXX 6000–6999Assigned IDT AMERICA, CORP. - NH 314C SEABROOK NH
2021-10-18 603-584-5XXX 5000–5999Assigned IDT AMERICA, CORP. - NH 314C CONCORD NH
2020-11-30 603-457-2XXX 2000–2999Assigned IDT AMERICA, CORP. - NH 314C DOVER NH
2020-11-24 603-405-0XXX 0000–0999Assigned IDT AMERICA, CORP. - NH 314C SOMERSWTH NH
2019-04-15 603-403-8XXX 8000–8999Assigned IDT AMERICA, CORP. - NH 314C ROCHESTER NH
2015-04-24 603-832-9XXX 9000–9999Assigned IDT AMERICA, CORP. - NH 314C LACONIA NH
2010-07-12 603-556-9XXX 9000–9999Assigned IDT AMERICA, CORP. - NH 314C LACONIA NH
2009-11-02 603-813-2XXX 2000–2999Assigned IDT AMERICA, CORP. - NH 314C CTRBARNSTE NH
2009-11-02 603-855-2XXX 2000–2999Assigned IDT AMERICA, CORP. - NH 314C ALTON NH
2009-11-02 603-872-2XXX 2000–2999Assigned IDT AMERICA, CORP. - NH 314C GLNTNIRWRS NH
2009-11-02 603-906-2XXX 2000–2999Assigned IDT AMERICA, CORP. - NH 314C BARNSTEAD NH
2009-10-23 603-701-2XXX 2000–2999Assigned IDT AMERICA, CORP. - NH 314C NEW DURHAM NH
2009-08-24 603-948-1XXX 1000–1999Assigned IDT AMERICA, CORP. - NH 314C ROCHESTER NH
2008-03-20 603-217-0XXX 0000–0999Assigned IDT AMERICA, CORP. - NH 314C BRISTOL NH
2008-03-20 603-238-0XXX 0000–0999Assigned IDT AMERICA, CORP. - NH 314C PLYMOUTH NH
2008-03-20 603-250-8XXX 8000–8999Assigned IDT AMERICA, CORP. - NH 314C CENTER HBR NH
2008-03-20 603-267-5XXX 5000–5999Assigned IDT AMERICA, CORP. - NH 314C BELMONT NH
2008-03-20 603-389-8XXX 8000–8999Assigned IDT AMERICA, CORP. - NH 314C DURHAM NH
2008-03-20 603-435-0XXX 0000–0999Assigned IDT AMERICA, CORP. - NH 314C PITTSFIELD NH
2008-03-20 603-463-1XXX 1000–1999Assigned IDT AMERICA, CORP. - NH 314C DEERFIELD NH
2008-03-20 603-473-1XXX 1000–1999Assigned IDT AMERICA, CORP. - NH 314C MILTON ML NH
2008-03-20 603-515-1XXX 1000–1999Assigned IDT AMERICA, CORP. - NH 314C WOLFEBORO NH
2008-03-20 603-527-8XXX 8000–8999Assigned IDT AMERICA, CORP. - NH 314C LACONIA NH
2008-03-20 603-652-8XXX 8000–8999Assigned IDT AMERICA, CORP. - NH 314C MILTON NH
2008-03-20 603-671-7XXX 7000–7999Assigned IDT AMERICA, CORP. - NH 314C FRANKLIN NH
2008-03-20 603-677-7XXX 7000–7999Assigned IDT AMERICA, CORP. - NH 314C MEREDITH NH
2008-03-20 603-729-0XXX 0000–0999Assigned IDT AMERICA, CORP. - NH 314C TILTON NH
2008-03-20 603-736-0XXX 0000–0999Assigned IDT AMERICA, CORP. - NH 314C EPSOM NH
2008-03-20 603-839-1XXX 1000–1999Assigned IDT AMERICA, CORP. - NH 314C FARMINGTON NH
2008-03-20 603-905-9XXX 9000–9999Assigned IDT AMERICA, CORP. - NH 314C BARRINGTON NH
2008-03-20 603-942-6XXX 6000–6999Assigned IDT AMERICA, CORP. - NH 314C NORTHWOOD NH
2008-03-20 603-968-6XXX 6000–6999Assigned IDT AMERICA, CORP. - NH 314C ASHLAND NH
2008-02-28 603-948-2XXX 2000–2999Assigned IDT AMERICA, CORP. - NH 314C ROCHESTER NH

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.