NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

1 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026

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, last 30 days — NPA 617
BANDWIDTH.COM CLEC, LLC - MA 1
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
2011-06-17 617-639-9XXX 9000–9999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F QUINCY MA
2011-06-17 617-651-8XXX 8000–8999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F BROOKLINE MA
2011-06-17 617-987-9XXX 9000–9999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F BRIGHTON MA
2011-06-13 617-639-1XXX 1000–1999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F QUINCY MA
2011-06-08 617-410-7XXX 7000–7999Assigned YMAX COMMUNICATIONS CORP. - MA 316E EVERETT MA
2011-05-31 617-329-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E WINTHROP MA
2011-05-31 617-370-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E CHELSEA MA
2011-05-31 617-855-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E BELMONT MA
2011-05-31 617-903-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E BRIGHTON MA
2011-05-20 617-318-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J ROXBURY MA
2011-05-18 617-639-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 QUINCY MA
2011-05-18 617-639-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 QUINCY MA
2011-05-18 617-639-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 QUINCY MA
2011-05-17 617-615-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MILTON MA
2011-05-17 617-690-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 MILTON MA
2011-05-10 617-275-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 BOSTON MA
2011-05-09 617-380-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E CHARLESTN MA
2011-05-09 617-420-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E EVERETT MA
2011-05-09 617-420-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E EVERETT MA
2011-05-09 617-564-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E NEWTON MA
2011-05-09 617-564-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E NEWTON MA
2011-05-09 617-651-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E BROOKLINE MA
2011-05-09 617-651-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E BROOKLINE MA
2011-05-09 617-657-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E QUINCY MA
2011-05-09 617-657-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E QUINCY MA
2011-05-09 617-657-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E QUINCY MA
2011-05-09 617-690-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E MILTON MA
2011-05-09 617-690-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E MILTON MA
2011-05-09 617-701-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E SO BOSTON MA
2011-05-09 617-996-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E SOMERVILLE MA
2011-05-09 617-996-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E SOMERVILLE MA
2011-04-18 617-390-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 JAMAICA PL MA
2011-04-18 617-390-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 JAMAICA PL MA
2011-04-18 617-390-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 JAMAICA PL MA
2011-04-04 617-634-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 EASTBOSTON MA
2011-04-01 617-902-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E CAMBRIDGE MA
2011-03-14 617-286-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E CHARLESTN MA
2011-03-03 617-716-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 EASTBOSTON MA
2011-03-03 617-766-6XXX 6000–6999Assigned YMAX COMMUNICATIONS CORP. - MA 316E SO BOSTON MA
2011-03-03 617-945-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 CAMBRIDGE MA
2011-02-28 617-600-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 WATERTOWN MA
2011-02-28 617-941-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 SOMERVILLE MA
2011-02-23 617-475-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E CAMBRIDGE MA
2011-02-23 617-520-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E CAMBRIDGE MA
2011-02-23 617-575-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E CAMBRIDGE MA
2011-02-23 617-714-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E CAMBRIDGE MA
2011-02-23 617-758-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E CAMBRIDGE MA
2011-02-17 617-453-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E CAMBRIDGE MA
2011-02-17 617-855-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E BELMONT MA
2011-02-17 617-932-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BELMONT MA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.