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
2006-03-22 857-366-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2006-03-22 857-366-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2006-03-22 857-366-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2006-03-07 857-998-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 CAMBRIDGE MA
2006-03-06 857-272-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BOSTON MA
2006-03-06 857-272-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BOSTON MA
2006-03-06 857-272-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BOSTON MA
2006-03-06 857-272-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BOSTON MA
2006-02-27 857-233-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 BOSTON MA
2006-02-27 857-233-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 BOSTON MA
2006-02-27 857-776-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 CHELSEA MA
2006-02-23 857-363-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 EVERETT MA
2006-02-23 857-363-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 EVERETT MA
2006-02-16 857-277-2XXX 2000–2999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2006-02-16 857-277-3XXX 3000–3999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2006-02-16 857-277-4XXX 4000–4999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2006-02-15 857-544-1XXX 1000–1999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 ROXBURY MA
2006-02-14 857-307-0XXX 0000–0999Assigned VERIZON NEW ENGLAND INC. 9102 BROOKLINE MA
2006-02-14 857-307-1XXX 1000–1999Assigned VERIZON NEW ENGLAND INC. 9102 BROOKLINE MA
2006-02-14 857-307-2XXX 2000–2999Assigned VERIZON NEW ENGLAND INC. 9102 BROOKLINE MA
2006-02-14 857-307-3XXX 3000–3999Assigned VERIZON NEW ENGLAND INC. 9102 BROOKLINE MA
2006-02-14 857-307-4XXX 4000–4999Assigned VERIZON NEW ENGLAND INC. 9102 BROOKLINE MA
2006-02-14 857-307-5XXX 5000–5999Assigned VERIZON NEW ENGLAND INC. 9102 BROOKLINE MA
2006-02-14 857-307-6XXX 6000–6999Assigned VERIZON NEW ENGLAND INC. 9102 BROOKLINE MA
2006-02-14 857-307-7XXX 7000–7999Assigned VERIZON NEW ENGLAND INC. 9102 BROOKLINE MA
2006-02-14 857-307-8XXX 8000–8999Assigned VERIZON NEW ENGLAND INC. 9102 BROOKLINE MA
2006-02-14 857-307-9XXX 9000–9999Assigned VERIZON NEW ENGLAND INC. 9102 BROOKLINE MA
2006-02-09 857-413-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BOSTON MA
2006-02-06 857-383-1XXX 1000–1999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2006-02-06 857-939-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 QUINCY MA
2006-01-05 857-413-8XXX 8000–8999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2006-01-05 857-413-9XXX 9000–9999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2005-12-12 857-413-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BOSTON MA
2005-12-12 857-413-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BOSTON MA
2005-12-07 857-383-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2005-12-07 857-383-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2005-11-23 857-383-0XXX 0000–0999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2005-11-14 857-383-2XXX 2000–2999Assigned PAETEC ITEL, LLC 829J BOSTON MA
2005-11-14 857-383-4XXX 4000–4999Assigned TC SYSTEMS, INC. 7135 BOSTON MA
2005-11-14 857-383-5XXX 5000–5999Assigned TC SYSTEMS, INC. 7135 BOSTON MA
2005-11-04 857-488-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2005-11-04 857-488-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2005-11-04 857-488-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2005-11-03 857-254-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 BOSTON MA
2005-11-03 857-254-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 BOSTON MA
2005-11-03 857-254-9XXX 9000–9999Assigned PAETEC ITEL, LLC 829J BOSTON MA
2005-10-26 857-383-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J BOSTON MA
2005-10-12 857-753-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J BOSTON MA
2005-10-11 857-488-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2005-10-11 857-488-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 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.