NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

2 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 857
BANDWIDTH.COM CLEC, LLC - MA 1
AHOI LLC 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
2008-05-01 857-288-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 BOSTON MA
2008-04-23 857-284-0XXX 0000–0999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BOSTON MA
2008-04-23 857-284-1XXX 1000–1999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BOSTON MA
2008-04-04 857-453-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J BOSTON MA
2008-03-31 857-366-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 BOSTON MA
2008-03-26 857-318-1XXX 1000–1999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2008-03-26 857-318-6XXX 6000–6999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2008-03-26 857-318-7XXX 7000–7999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2008-03-26 857-318-8XXX 8000–8999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2008-03-26 857-318-9XXX 9000–9999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2008-03-06 857-939-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 QUINCY MA
2008-03-04 857-453-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J BOSTON MA
2008-02-26 857-342-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J HYDE PARK MA
2008-02-05 857-453-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 BOSTON MA
2008-02-04 857-342-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 HYDE PARK MA
2008-01-18 857-284-2XXX 2000–2999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2008-01-18 857-284-3XXX 3000–3999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2008-01-18 857-284-9XXX 9000–9999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2008-01-08 857-919-7XXX 7000–7999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BRIGHTON MA
2007-12-27 857-225-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BROOKLINE MA
2007-12-26 857-453-2XXX 2000–2999Assigned PAETEC ITEL, LLC 829J BOSTON MA
2007-11-19 857-238-0XXX 0000–0999Assigned VERIZON NEW ENGLAND INC. 9102 BOSTON MA
2007-11-19 857-238-1XXX 1000–1999Assigned VERIZON NEW ENGLAND INC. 9102 BOSTON MA
2007-11-19 857-238-2XXX 2000–2999Assigned VERIZON NEW ENGLAND INC. 9102 BOSTON MA
2007-11-19 857-238-3XXX 3000–3999Assigned VERIZON NEW ENGLAND INC. 9102 BOSTON MA
2007-11-19 857-238-4XXX 4000–4999Assigned VERIZON NEW ENGLAND INC. 9102 BOSTON MA
2007-11-19 857-238-5XXX 5000–5999Assigned VERIZON NEW ENGLAND INC. 9102 BOSTON MA
2007-11-19 857-238-6XXX 6000–6999Assigned VERIZON NEW ENGLAND INC. 9102 BOSTON MA
2007-11-19 857-238-7XXX 7000–7999Assigned VERIZON NEW ENGLAND INC. 9102 BOSTON MA
2007-11-19 857-238-8XXX 8000–8999Assigned VERIZON NEW ENGLAND INC. 9102 BOSTON MA
2007-11-19 857-238-9XXX 9000–9999Assigned VERIZON NEW ENGLAND INC. 9102 BOSTON MA
2007-11-19 857-366-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 BOSTON MA
2007-11-09 857-350-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BOSTON MA
2007-11-09 857-350-9XXX 9000–9999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BOSTON MA
2007-10-22 857-318-0XXX 0000–0999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BOSTON MA
2007-10-16 857-241-7XXX 7000–7999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2007-10-16 857-294-5XXX 5000–5999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2007-10-16 857-294-6XXX 6000–6999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2007-10-16 857-294-7XXX 7000–7999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2007-10-16 857-350-2XXX 2000–2999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2007-10-16 857-350-5XXX 5000–5999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2007-10-16 857-350-6XXX 6000–6999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2007-10-16 857-350-7XXX 7000–7999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2007-10-16 857-364-7XXX 7000–7999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BROOKLINE MA
2007-10-16 857-389-7XXX 7000–7999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 CHARLESTN MA
2007-10-16 857-756-2XXX 2000–2999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 CAMBRIDGE MA
2007-09-21 857-241-6XXX 6000–6999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2007-09-19 857-350-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J BOSTON MA
2007-09-19 857-350-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J BOSTON MA
2007-09-18 857-241-2XXX 2000–2999Assigned PAETEC ITEL, LLC 829J 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.