NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

1 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, 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
2013-07-29 617-318-4XXX 4000–4999Assigned IP HORIZON LLC 515J ROXBURY MA
2013-07-29 617-446-4XXX 4000–4999Assigned IP HORIZON LLC 515J DORCHESTER MA
2013-07-29 617-454-8XXX 8000–8999Assigned IP HORIZON LLC 515J NEWTON MA
2013-07-29 617-764-8XXX 8000–8999Assigned IP HORIZON LLC 515J SOMERVILLE MA
2013-07-26 617-751-3XXX 3000–3999Assigned RCN TELECOM SERVICES, INC. - MA 7619 BROOKLINE MA
2013-07-22 617-505-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J BROOKLINE MA
2013-07-11 617-982-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J BOSTON MA
2013-07-11 617-982-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J BOSTON MA
2013-07-10 617-487-1XXX 1000–1999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BROOKLINE MA
2013-07-03 617-982-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J BOSTON MA
2013-06-26 617-712-8XXX 8000–8999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 CHARLESTN MA
2013-06-26 617-952-1XXX 1000–1999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 CHARLESTN MA
2013-06-26 617-982-4XXX 4000–4999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2013-06-26 617-982-8XXX 8000–8999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2013-06-26 617-987-5XXX 5000–5999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BRIGHTON MA
2013-06-26 617-987-7XXX 7000–7999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BRIGHTON MA
2013-06-20 617-294-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J EVERETT MA
2013-06-20 617-356-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E BOSTON MA
2013-06-20 617-356-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E BOSTON MA
2013-06-20 617-366-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E BOSTON MA
2013-06-20 617-898-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E MILTON MA
2013-06-10 617-481-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J QUINCY MA
2013-05-31 617-505-9XXX 9000–9999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BROOKLINE MA
2013-05-31 617-608-8XXX 8000–8999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BROOKLINE MA
2013-05-20 617-545-6XXX 6000–6999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J EVERETT MA
2013-05-16 617-463-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E SO BOSTON MA
2013-05-16 617-702-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E SOMERVILLE MA
2013-05-16 617-977-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E BELMONT MA
2013-05-06 617-932-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J BELMONT MA
2013-05-02 617-982-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E BOSTON MA
2013-05-02 617-982-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E BOSTON MA
2013-05-02 617-982-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E BOSTON MA
2013-04-24 617-263-8XXX 8000–8999Assigned ONVOY, LLC - MA 892D BOSTON MA
2013-04-24 617-356-1XXX 1000–1999Assigned ONVOY, LLC - MA 892D BOSTON MA
2013-04-24 617-936-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BOSTON MA
2013-04-24 617-936-9XXX 9000–9999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2013-04-24 617-961-9XXX 9000–9999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2013-04-23 617-859-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BOSTON MA
2013-04-22 617-380-8XXX 8000–8999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 CHARLESTN MA
2013-04-22 617-580-1XXX 1000–1999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 CHARLESTN MA
2013-04-08 617-207-8XXX 8000–8999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F WINTHROP MA
2013-04-08 617-841-9XXX 9000–9999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F WINTHROP MA
2013-04-05 617-993-0XXX 0000–0999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F BELMONT MA
2013-04-05 617-993-8XXX 8000–8999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F BELMONT MA
2013-03-22 617-221-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E QUINCY MA
2013-03-22 617-221-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E QUINCY MA
2013-03-22 617-221-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E QUINCY MA
2013-03-22 617-302-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E QUINCY MA
2013-03-18 617-483-1XXX 1000–1999Assigned IP HORIZON LLC 515J QUINCY MA
2013-03-15 617-341-8XXX 8000–8999Assigned ONVOY, LLC - MA 892D 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.