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
2012-11-12 857-234-5XXX 5000–5999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BROOKLINE MA
2012-11-12 857-389-5XXX 5000–5999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 CHARLESTN MA
2012-11-09 857-303-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2012-11-09 857-303-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2012-11-02 857-248-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J BOSTON MA
2012-10-24 857-313-8XXX 8000–8999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2012-10-24 857-313-9XXX 9000–9999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2012-10-19 857-229-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 NEWTON MA
2012-10-19 857-229-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 NEWTON MA
2012-10-19 857-229-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 NEWTON MA
2012-10-19 857-229-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 NEWTON MA
2012-10-18 857-333-5XXX 5000–5999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2012-10-18 857-333-6XXX 6000–6999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2012-10-18 857-333-7XXX 7000–7999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2012-10-18 857-333-8XXX 8000–8999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2012-10-18 857-816-6XXX 6000–6999Assigned TC SYSTEMS, INC. 7135 WINTHROP MA
2012-10-17 857-342-6XXX 6000–6999Assigned TC SYSTEMS, INC. 7135 HYDE PARK MA
2012-10-02 857-208-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2012-10-02 857-208-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2012-10-02 857-208-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2012-10-02 857-208-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2012-10-02 857-208-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2012-10-01 857-242-8XXX 8000–8999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 CAMBRIDGE MA
2012-10-01 857-242-9XXX 9000–9999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 CAMBRIDGE MA
2012-09-18 857-389-4XXX 4000–4999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 CHARLESTN MA
2012-09-07 857-209-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E CAMBRIDGE MA
2012-09-07 857-229-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 NEWTON MA
2012-09-07 857-229-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 NEWTON MA
2012-09-07 857-229-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 NEWTON MA
2012-09-07 857-242-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E CAMBRIDGE MA
2012-09-07 857-242-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E CAMBRIDGE MA
2012-09-06 857-214-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2012-09-05 857-268-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J BOSTON MA
2012-08-30 857-206-8XXX 8000–8999Assigned PAETEC ITEL, LLC 829J BOSTON MA
2012-08-30 857-242-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J CAMBRIDGE MA
2012-08-28 857-268-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J BOSTON MA
2012-08-28 857-300-6XXX 6000–6999Assigned PAETEC ITEL, LLC 829J BOSTON MA
2012-08-27 857-498-8XXX 8000–8999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BRIGHTON MA
2012-08-27 857-498-9XXX 9000–9999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BRIGHTON MA
2012-08-22 857-265-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J BOSTON MA
2012-08-22 857-265-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J BOSTON MA
2012-08-17 857-285-9XXX 9000–9999Assigned PAETEC ITEL, LLC 829J CAMBRIDGE MA
2012-08-08 857-265-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J BOSTON MA
2012-08-07 857-250-1XXX 1000–1999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2012-08-07 857-260-9XXX 9000–9999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2012-08-07 857-264-6XXX 6000–6999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2012-08-07 857-265-0XXX 0000–0999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2012-08-07 857-265-1XXX 1000–1999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2012-07-18 857-230-8XXX 8000–8999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 ROXBURY MA
2012-07-10 857-777-5XXX 5000–5999Assigned 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.