NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

2 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 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
2014-07-28 857-452-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E CHARLESTN MA
2014-07-24 857-260-8XXX 8000–8999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2014-07-24 857-263-1XXX 1000–1999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2014-07-24 857-317-9XXX 9000–9999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2014-07-24 857-415-0XXX 0000–0999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2014-07-24 857-415-1XXX 1000–1999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2014-07-24 857-701-2XXX 2000–2999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 ROXBURY MA
2014-07-24 857-701-3XXX 3000–3999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 ROXBURY MA
2014-07-15 857-702-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 BOSTON MA
2014-07-10 857-540-8XXX 8000–8999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BRIGHTON MA
2014-07-03 857-345-8XXX 8000–8999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F HYDE PARK MA
2014-06-23 857-496-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E SO BOSTON MA
2014-06-23 857-496-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E SO BOSTON MA
2014-06-19 857-500-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 CAMBRIDGE MA
2014-06-11 857-930-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 BOSTON MA
2014-06-06 857-776-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J CHELSEA MA
2014-06-04 857-452-2XXX 2000–2999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 CHARLESTN MA
2014-05-16 857-267-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E MILTON MA
2014-05-16 857-267-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E MILTON MA
2014-05-16 857-271-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E DORCHESTER MA
2014-05-16 857-271-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E DORCHESTER MA
2014-05-16 857-273-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J JAMAICA PL MA
2014-05-16 857-345-4XXX 4000–4999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J HYDE PARK MA
2014-05-08 857-415-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BOSTON MA
2014-05-06 857-242-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E CAMBRIDGE MA
2014-05-06 857-285-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E CAMBRIDGE MA
2014-05-06 857-285-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E CAMBRIDGE MA
2014-05-06 857-285-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E CAMBRIDGE MA
2014-05-06 857-285-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E CAMBRIDGE MA
2014-05-06 857-540-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E BRIGHTON MA
2014-05-06 857-540-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E BRIGHTON MA
2014-05-05 857-317-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J BOSTON MA
2014-05-05 857-317-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J BOSTON MA
2014-05-05 857-317-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J BOSTON MA
2014-04-30 857-242-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J CAMBRIDGE MA
2014-04-29 857-305-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 BOSTON MA
2014-04-25 857-345-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 HYDE PARK MA
2014-04-25 857-500-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 CAMBRIDGE MA
2014-04-25 857-523-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 SOMERVILLE MA
2014-04-23 857-202-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2014-04-23 857-260-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2014-04-23 857-260-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2014-04-23 857-260-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2014-04-23 857-260-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2014-04-23 857-268-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2014-04-23 857-268-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2014-04-23 857-300-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2014-04-23 857-300-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2014-04-15 857-305-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 BOSTON MA
2014-04-15 857-305-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 BOSTON 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.