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
2015-06-29 857-666-9XXX 9000–9999Assigned ONVOY, LLC - MA 892D BROOKLINE MA
2015-06-29 857-930-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2015-06-29 857-930-7XXX 7000–7999Assigned ONVOY, LLC - MA 892D BOSTON MA
2015-06-29 857-957-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J BOSTON MA
2015-06-29 857-957-2XXX 2000–2999Assigned ONVOY, LLC - MA 892D BOSTON MA
2015-06-29 857-957-4XXX 4000–4999Assigned ONVOY, LLC - MA 892D BOSTON MA
2015-06-29 857-957-5XXX 5000–5999Assigned ONVOY, LLC - MA 892D BOSTON MA
2015-06-29 857-957-6XXX 6000–6999Assigned ONVOY, LLC - MA 892D BOSTON MA
2015-06-29 857-957-7XXX 7000–7999Assigned ONVOY, LLC - MA 892D BOSTON MA
2015-06-29 857-957-9XXX 9000–9999Assigned ONVOY, LLC - MA 892D BOSTON MA
2015-06-26 857-957-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BOSTON MA
2015-06-23 857-293-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E EASTBOSTON MA
2015-06-23 857-703-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E HYDE PARK MA
2015-06-23 857-770-8XXX 8000–8999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2015-06-23 857-800-1XXX 1000–1999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2015-06-23 857-800-2XXX 2000–2999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2015-06-23 857-800-3XXX 3000–3999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2015-06-23 857-800-4XXX 4000–4999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2015-06-23 857-800-5XXX 5000–5999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2015-06-19 857-319-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2015-06-19 857-319-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2015-06-19 857-325-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 NEWTON MA
2015-06-19 857-330-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2015-06-19 857-330-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2015-06-19 857-352-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BROOKLINE MA
2015-06-19 857-352-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BROOKLINE MA
2015-06-18 857-270-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - MA 4018 CAMBRIDGE MA
2015-06-08 857-770-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J BOSTON MA
2015-06-08 857-770-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J BOSTON MA
2015-06-08 857-770-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J BOSTON MA
2015-06-08 857-770-6XXX 6000–6999Assigned PAETEC ITEL, LLC 829J BOSTON MA
2015-06-08 857-770-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J BOSTON MA
2015-06-05 857-319-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2015-06-05 857-319-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2015-06-02 857-407-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ROXBURY MA
2015-06-02 857-407-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ROXBURY MA
2015-06-01 857-703-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 HYDE PARK MA
2015-05-29 857-352-0XXX 0000–0999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F BROOKLINE MA
2015-05-22 857-304-6XXX 6000–6999Assigned TC SYSTEMS, INC. 7135 WATERTOWN MA
2015-05-20 857-303-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2015-05-20 857-303-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2015-05-20 857-308-5XXX 5000–5999Assigned HD CARRIER LLC 321J ROXBURY MA
2015-05-20 857-309-9XXX 9000–9999Assigned HD CARRIER LLC 321J DORCHESTER MA
2015-05-20 857-325-5XXX 5000–5999Assigned HD CARRIER LLC 321J NEWTON MA
2015-05-20 857-330-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2015-05-14 857-304-9XXX 9000–9999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F WATERTOWN MA
2015-05-14 857-626-7XXX 7000–7999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F BELMONT MA
2015-05-14 857-777-4XXX 4000–4999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F CAMBRIDGE MA
2015-04-30 857-273-5XXX 5000–5999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F JAMAICA PL MA
2015-04-30 857-316-0XXX 0000–0999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F BRIGHTON 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.