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 617
YMAX COMMUNICATIONS CORP. - MA 45
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
2013-11-13 617-712-4XXX 4000–4999Assigned YMAX COMMUNICATIONS CORP. - MA 316E CHARLESTN MA
2011-06-08 617-410-7XXX 7000–7999Assigned YMAX COMMUNICATIONS CORP. - MA 316E EVERETT MA
2011-03-03 617-766-6XXX 6000–6999Assigned YMAX COMMUNICATIONS CORP. - MA 316E SO BOSTON MA
2010-10-14 617-649-6XXX 6000–6999Assigned YMAX COMMUNICATIONS CORP. - MA 316E CAMBRIDGE MA
2010-10-14 617-649-7XXX 7000–7999Assigned YMAX COMMUNICATIONS CORP. - MA 316E CAMBRIDGE MA
2010-10-14 617-858-3XXX 3000–3999Assigned YMAX COMMUNICATIONS CORP. - MA 316E ROXBURY MA
2009-11-04 617-419-5XXX 5000–5999Assigned YMAX COMMUNICATIONS CORP. - MA 316E BOSTON MA
2009-11-04 617-419-6XXX 6000–6999Assigned YMAX COMMUNICATIONS CORP. - MA 316E BOSTON MA
2009-11-04 617-440-8XXX 8000–8999Assigned YMAX COMMUNICATIONS CORP. - MA 316E SOMERVILLE MA
2009-11-04 617-652-2XXX 2000–2999Assigned YMAX COMMUNICATIONS CORP. - MA 316E ROXBURY MA
2009-11-04 617-701-3XXX 3000–3999Assigned YMAX COMMUNICATIONS CORP. - MA 316E SO BOSTON MA
2009-11-04 617-718-4XXX 4000–4999Assigned YMAX COMMUNICATIONS CORP. - MA 316E SOMERVILLE MA
2009-08-11 617-322-7XXX 7000–7999Assigned YMAX COMMUNICATIONS CORP. - MA 316E MILTON MA
2009-08-11 617-433-6XXX 6000–6999Assigned YMAX COMMUNICATIONS CORP. - MA 316E MILTON MA
2009-08-11 617-586-7XXX 7000–7999Assigned YMAX COMMUNICATIONS CORP. - MA 316E BRIGHTON MA
2009-07-14 617-237-9XXX 9000–9999Assigned YMAX COMMUNICATIONS CORP. - MA 316E QUINCY MA
2009-02-04 617-208-5XXX 5000–5999Assigned YMAX COMMUNICATIONS CORP. - MA 316E BRIGHTON MA
2009-02-04 617-294-7XXX 7000–7999Assigned YMAX COMMUNICATIONS CORP. - MA 316E EVERETT MA
2009-02-04 617-318-9XXX 9000–9999Assigned YMAX COMMUNICATIONS CORP. - MA 316E ROXBURY MA
2009-02-04 617-674-4XXX 4000–4999Assigned YMAX COMMUNICATIONS CORP. - MA 316E CAMBRIDGE MA
2009-02-04 617-758-7XXX 7000–7999Assigned YMAX COMMUNICATIONS CORP. - MA 316E CAMBRIDGE MA
2009-02-04 617-942-5XXX 5000–5999Assigned YMAX COMMUNICATIONS CORP. - MA 316E JAMAICA PL MA
2008-10-31 617-718-3XXX 3000–3999Assigned YMAX COMMUNICATIONS CORP. - MA 316E SOMERVILLE MA
2008-10-30 617-302-5XXX 5000–5999Assigned YMAX COMMUNICATIONS CORP. - MA 316E QUINCY MA
2008-10-30 617-322-6XXX 6000–6999Assigned YMAX COMMUNICATIONS CORP. - MA 316E MILTON MA
2008-10-30 617-431-7XXX 7000–7999Assigned YMAX COMMUNICATIONS CORP. - MA 316E NEWTON MA
2008-09-04 617-334-9XXX 9000–9999Assigned YMAX COMMUNICATIONS CORP. - MA 316E SO BOSTON MA
2008-06-19 617-391-7XXX 7000–7999Assigned YMAX COMMUNICATIONS CORP. - MA 316E BOSTON MA
2008-06-19 617-391-8XXX 8000–8999Assigned YMAX COMMUNICATIONS CORP. - MA 316E BOSTON MA
2008-06-04 617-208-7XXX 7000–7999Assigned YMAX COMMUNICATIONS CORP. - MA 316E BRIGHTON MA
2008-06-04 617-682-8XXX 8000–8999Assigned YMAX COMMUNICATIONS CORP. - MA 316E CAMBRIDGE MA
2008-04-25 617-614-8XXX 8000–8999Assigned YMAX COMMUNICATIONS CORP. - MA 316E NEWTON MA
2008-02-08 617-284-3XXX 3000–3999Assigned YMAX COMMUNICATIONS CORP. - MA 316E SOMERVILLE MA
2008-02-08 617-313-6XXX 6000–6999Assigned YMAX COMMUNICATIONS CORP. - MA 316E MILTON MA
2008-02-08 617-334-6XXX 6000–6999Assigned YMAX COMMUNICATIONS CORP. - MA 316E SO BOSTON MA
2008-02-08 617-398-3XXX 3000–3999Assigned YMAX COMMUNICATIONS CORP. - MA 316E CHARLESTN MA
2008-02-08 617-874-2XXX 2000–2999Assigned YMAX COMMUNICATIONS CORP. - MA 316E EASTBOSTON MA
2008-02-07 617-208-3XXX 3000–3999Assigned YMAX COMMUNICATIONS CORP. - MA 316E BRIGHTON MA
2008-02-07 617-237-5XXX 5000–5999Assigned YMAX COMMUNICATIONS CORP. - MA 316E QUINCY MA
2008-02-07 617-252-8XXX 8000–8999Assigned YMAX COMMUNICATIONS CORP. - MA 316E CAMBRIDGE MA
2008-02-07 617-294-3XXX 3000–3999Assigned YMAX COMMUNICATIONS CORP. - MA 316E EVERETT MA
2008-02-07 617-516-6XXX 6000–6999Assigned YMAX COMMUNICATIONS CORP. - MA 316E ROXBURY MA
2008-02-07 617-942-3XXX 3000–3999Assigned YMAX COMMUNICATIONS CORP. - MA 316E JAMAICA PL MA
2007-07-13 617-614-7XXX 7000–7999Assigned YMAX COMMUNICATIONS CORP. - MA 316E NEWTON MA
2007-07-12 617-502-0XXX 0000–0999Assigned YMAX COMMUNICATIONS CORP. - MA 316E BOSTON MA

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.