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
2010-10-05 617-419-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J BOSTON MA
2010-09-22 617-249-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E QUINCY MA
2010-09-22 617-855-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E BELMONT MA
2010-09-10 617-608-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J BROOKLINE MA
2010-09-03 617-294-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J EVERETT MA
2010-08-27 617-394-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E EVERETT MA
2010-08-26 617-682-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E CAMBRIDGE MA
2010-08-26 617-764-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J SOMERVILLE MA
2010-08-26 617-800-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E CAMBRIDGE MA
2010-08-26 617-945-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E CAMBRIDGE MA
2010-08-19 617-949-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 CAMBRIDGE MA
2010-08-19 617-949-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 CAMBRIDGE MA
2010-08-19 617-949-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 CAMBRIDGE MA
2010-08-19 617-949-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 CAMBRIDGE MA
2010-08-17 617-807-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E BOSTON MA
2010-08-11 617-506-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E DORCHESTER MA
2010-08-11 617-870-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E BRIGHTON MA
2010-07-28 617-766-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E SO BOSTON MA
2010-07-26 617-841-5XXX 5000–5999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F WINTHROP MA
2010-07-14 617-209-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E BELMONT MA
2010-07-12 617-419-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J BOSTON MA
2010-07-12 617-419-8XXX 8000–8999Assigned PAETEC ITEL, LLC 829J BOSTON MA
2010-07-12 617-419-9XXX 9000–9999Assigned PAETEC ITEL, LLC 829J BOSTON MA
2010-07-12 617-807-2XXX 2000–2999Assigned PAETEC ITEL, LLC 829J BOSTON MA
2010-07-12 617-807-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J BOSTON MA
2010-07-12 617-807-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J BOSTON MA
2010-07-12 617-807-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J BOSTON MA
2010-07-12 617-807-6XXX 6000–6999Assigned PAETEC ITEL, LLC 829J BOSTON MA
2010-07-12 617-807-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J BOSTON MA
2010-07-12 617-807-8XXX 8000–8999Assigned PAETEC ITEL, LLC 829J BOSTON MA
2010-07-12 617-807-9XXX 9000–9999Assigned PAETEC ITEL, LLC 829J BOSTON MA
2010-07-01 617-714-6XXX 6000–6999Assigned PAETEC ITEL, LLC 829J CAMBRIDGE MA
2010-06-03 617-874-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 EASTBOSTON MA
2010-06-02 617-758-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 CAMBRIDGE MA
2010-05-27 617-237-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E QUINCY MA
2010-05-27 617-396-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E BROOKLINE MA
2010-05-27 617-410-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E EVERETT MA
2010-05-27 617-433-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E MILTON MA
2010-05-27 617-454-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E NEWTON MA
2010-05-27 617-612-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E WATERTOWN MA
2010-05-27 617-701-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E SO BOSTON MA
2010-05-27 617-702-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E SOMERVILLE MA
2010-05-27 617-858-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E ROXBURY MA
2010-05-27 617-958-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E CHELSEA MA
2010-05-25 617-446-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E DORCHESTER MA
2010-05-25 617-682-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E CAMBRIDGE MA
2010-05-19 617-807-1XXX 1000–1999Assigned PAETEC ITEL, LLC 829J BOSTON MA
2010-05-04 617-668-3XXX 3000–3999Assigned TC SYSTEMS, INC. 7135 WATERTOWN MA
2010-04-08 617-858-2XXX 2000–2999Assigned PAETEC ITEL, LLC 829J ROXBURY MA
2010-04-07 617-514-5XXX 5000–5999Assigned TC SYSTEMS, INC. 7135 DORCHESTER 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.