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
2006-10-24 617-415-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 BRIGHTON MA
2006-10-24 617-475-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 CAMBRIDGE MA
2006-10-19 617-533-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J DORCHESTER MA
2006-10-19 617-533-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J DORCHESTER MA
2006-10-19 617-993-1XXX 1000–1999Assigned VERIZON NEW ENGLAND INC. 9102 BELMONT MA
2006-10-19 617-993-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J BELMONT MA
2006-10-16 617-209-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BELMONT MA
2006-10-16 617-690-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J MILTON MA
2006-10-16 617-690-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J MILTON MA
2006-10-16 617-714-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J CAMBRIDGE MA
2006-10-16 617-714-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J CAMBRIDGE MA
2006-10-16 617-714-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J CAMBRIDGE MA
2006-10-11 617-955-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 CAMBRIDGE MA
2006-10-05 617-418-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J EASTBOSTON MA
2006-10-05 617-849-6XXX 6000–6999Assigned PAETEC ITEL, LLC 829J BOSTON MA
2006-10-04 617-360-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 HYDE PARK MA
2006-10-04 617-903-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J BRIGHTON MA
2006-10-04 617-903-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J BRIGHTON MA
2006-10-02 617-467-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J NEWTON MA
2006-10-02 617-467-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J NEWTON MA
2006-09-25 617-849-0XXX 0000–0999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2006-09-25 617-849-1XXX 1000–1999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2006-09-25 617-849-3XXX 3000–3999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2006-09-25 617-849-4XXX 4000–4999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2006-09-18 617-340-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 NEWTON MA
2006-09-14 617-676-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 JAMAICA PL MA
2006-09-12 617-674-8XXX 8000–8999Assigned PAETEC ITEL, LLC 829J CAMBRIDGE MA
2006-09-07 617-302-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J QUINCY MA
2006-09-07 617-302-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J QUINCY MA
2006-09-07 617-833-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 HYDE PARK MA
2006-09-07 617-910-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 HYDE PARK MA
2006-08-31 617-433-1XXX 1000–1999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 MILTON MA
2006-08-22 617-849-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 BOSTON MA
2006-08-18 617-326-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 DORCHESTER MA
2006-08-18 617-607-5XXX 5000–5999Assigned U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J WATERTOWN MA
2006-08-16 617-477-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J JAMAICA PL MA
2006-08-16 617-477-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J JAMAICA PL MA
2006-08-15 617-207-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J WINTHROP MA
2006-08-14 617-315-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J SO BOSTON MA
2006-08-02 617-997-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 EASTBOSTON MA
2006-08-02 617-997-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 EASTBOSTON MA
2006-08-02 617-997-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 EASTBOSTON MA
2006-08-02 617-997-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 EASTBOSTON MA
2006-07-26 617-337-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 CHARLESTN MA
2006-07-25 617-321-1XXX 1000–1999Assigned PAETEC ITEL, LLC 829J WATERTOWN MA
2006-07-17 617-708-2XXX 2000–2999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 ROXBURY MA
2006-07-17 617-765-5XXX 5000–5999Assigned METROPCS, INC. 5562 SO BOSTON MA
2006-07-13 617-850-9XXX 9000–9999Assigned PAETEC ITEL, LLC 829J BOSTON MA
2006-07-13 617-910-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 HYDE PARK MA
2006-07-11 617-674-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 CAMBRIDGE 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.