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
2005-03-03 617-398-5XXX 5000–5999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J CHARLESTN MA
2005-03-03 617-674-5XXX 5000–5999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J CAMBRIDGE MA
2005-03-01 617-671-4XXX 4000–4999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2005-03-01 617-904-8XXX 8000–8999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2005-02-25 617-671-3XXX 3000–3999Assigned TC SYSTEMS, INC. 7135 BOSTON MA
2005-02-23 617-500-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 CAMBRIDGE MA
2005-02-23 617-500-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 CAMBRIDGE MA
2005-02-23 617-500-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 CAMBRIDGE MA
2005-02-20 617-830-5XXX 5000–5999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J BOSTON MA
2005-02-18 617-871-2XXX 2000–2999Assigned PAETEC ITEL, LLC 829J CAMBRIDGE MA
2005-02-17 617-595-0XXX 0000–0999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2005-02-17 617-595-1XXX 1000–1999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2005-02-17 617-595-2XXX 2000–2999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2005-02-17 617-595-3XXX 3000–3999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2005-02-16 617-500-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 CAMBRIDGE MA
2005-02-16 617-600-1XXX 1000–1999Assigned PAETEC ITEL, LLC 829J WATERTOWN MA
2005-02-08 617-231-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J WATERTOWN MA
2005-02-08 617-250-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 CAMBRIDGE MA
2005-02-08 617-418-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 EASTBOSTON MA
2005-02-08 617-904-9XXX 9000–9999Assigned PAETEC ITEL, LLC 829J BOSTON MA
2005-02-07 617-595-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2005-02-07 617-595-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2005-02-07 617-595-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2005-02-07 617-595-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2005-02-04 617-314-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 BOSTON MA
2005-02-04 617-314-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 BOSTON MA
2005-02-04 617-314-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 BOSTON MA
2005-01-25 617-459-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BOSTON MA
2005-01-25 617-459-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BOSTON MA
2005-01-25 617-459-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BOSTON MA
2005-01-25 617-459-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BOSTON MA
2005-01-25 617-459-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BOSTON MA
2005-01-25 617-459-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BOSTON MA
2005-01-25 617-671-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BOSTON MA
2005-01-25 617-671-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BOSTON MA
2005-01-25 617-671-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BOSTON MA
2005-01-18 617-329-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J WINTHROP MA
2005-01-18 617-477-2XXX 2000–2999Assigned PAETEC ITEL, LLC 829J JAMAICA PL MA
2005-01-13 617-309-0XXX 0000–0999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2005-01-13 617-309-6XXX 6000–6999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2005-01-13 617-459-0XXX 0000–0999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2005-01-06 617-606-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 ROXBURY MA
2005-01-06 617-765-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 SO BOSTON MA
2004-12-29 617-553-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 JAMAICA PL MA
2004-12-21 617-459-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 BOSTON MA
2004-12-20 617-934-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 QUINCY MA
2004-12-09 617-671-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 BOSTON MA
2004-12-08 617-213-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 NEWTON MA
2004-12-08 617-309-7XXX 7000–7999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2004-12-08 617-309-8XXX 8000–8999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 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.