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
2014-12-17 857-309-0XXX 0000–0999Assigned ONVOY, LLC - MA 892D DORCHESTER MA
2014-12-17 857-309-1XXX 1000–1999Assigned ONVOY, LLC - MA 892D DORCHESTER MA
2014-12-17 857-309-2XXX 2000–2999Assigned ONVOY, LLC - MA 892D DORCHESTER MA
2014-12-12 857-320-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 CAMBRIDGE MA
2014-12-12 857-320-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 CAMBRIDGE MA
2014-12-11 857-267-8XXX 8000–8999Assigned ONVOY, LLC - MA 892D MILTON MA
2014-12-11 857-267-9XXX 9000–9999Assigned ONVOY, LLC - MA 892D MILTON MA
2014-12-11 857-273-8XXX 8000–8999Assigned ONVOY, LLC - MA 892D JAMAICA PL MA
2014-12-11 857-273-9XXX 9000–9999Assigned ONVOY, LLC - MA 892D JAMAICA PL MA
2014-12-11 857-320-3XXX 3000–3999Assigned ONVOY, LLC - MA 892D CAMBRIDGE MA
2014-12-11 857-320-4XXX 4000–4999Assigned ONVOY, LLC - MA 892D CAMBRIDGE MA
2014-12-11 857-524-2XXX 2000–2999Assigned ONVOY, LLC - MA 892D SO BOSTON MA
2014-12-11 857-524-3XXX 3000–3999Assigned ONVOY, LLC - MA 892D SO BOSTON MA
2014-12-10 857-707-3XXX 3000–3999Assigned ONVOY, LLC - MA 892D BROOKLINE MA
2014-12-10 857-707-4XXX 4000–4999Assigned ONVOY, LLC - MA 892D BROOKLINE MA
2014-12-03 857-302-6XXX 6000–6999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F BOSTON MA
2014-11-21 857-226-0XXX 0000–0999Assigned ONVOY, LLC - MA 892D NEWTON MA
2014-11-21 857-226-1XXX 1000–1999Assigned ONVOY, LLC - MA 892D NEWTON MA
2014-11-21 857-226-2XXX 2000–2999Assigned ONVOY, LLC - MA 892D NEWTON MA
2014-11-21 857-271-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 DORCHESTER MA
2014-11-21 857-403-6XXX 6000–6999Assigned ONVOY, LLC - MA 892D QUINCY MA
2014-11-21 857-403-7XXX 7000–7999Assigned ONVOY, LLC - MA 892D QUINCY MA
2014-11-21 857-403-8XXX 8000–8999Assigned ONVOY, LLC - MA 892D QUINCY MA
2014-11-21 857-403-9XXX 9000–9999Assigned ONVOY, LLC - MA 892D QUINCY MA
2014-11-20 857-330-4XXX 4000–4999Assigned ONVOY, LLC - MA 892D BOSTON MA
2014-11-20 857-330-5XXX 5000–5999Assigned ONVOY, LLC - MA 892D BOSTON MA
2014-11-20 857-330-6XXX 6000–6999Assigned ONVOY, LLC - MA 892D BOSTON MA
2014-11-14 857-707-1XXX 1000–1999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BROOKLINE MA
2014-11-14 857-707-7XXX 7000–7999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BROOKLINE MA
2014-11-14 857-707-8XXX 8000–8999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BROOKLINE MA
2014-11-14 857-707-9XXX 9000–9999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BROOKLINE MA
2014-11-13 857-273-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 JAMAICA PL MA
2014-10-15 857-310-8XXX 8000–8999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2014-10-15 857-310-9XXX 9000–9999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2014-10-15 857-320-9XXX 9000–9999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 CAMBRIDGE MA
2014-10-13 857-707-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BROOKLINE MA
2014-10-09 857-302-8XXX 8000–8999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2014-10-09 857-302-9XXX 9000–9999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2014-10-06 857-415-6XXX 6000–6999Assigned ONVOY, LLC - MA 892D BOSTON MA
2014-10-06 857-930-2XXX 2000–2999Assigned ONVOY, LLC - MA 892D BOSTON MA
2014-10-02 857-308-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J ROXBURY MA
2014-10-02 857-330-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2014-10-02 857-330-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2014-10-02 857-330-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2014-10-01 857-270-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 CAMBRIDGE MA
2014-10-01 857-957-1XXX 1000–1999Assigned WIDE VOICE, LLC - MA 756G BOSTON MA
2014-09-30 857-304-5XXX 5000–5999Assigned TC SYSTEMS, INC. 7135 WATERTOWN MA
2014-09-30 857-706-8XXX 8000–8999Assigned PAETEC ITEL, LLC 829J CAMBRIDGE MA
2014-09-24 857-271-4XXX 4000–4999Assigned ONVOY, LLC - MA 892D DORCHESTER MA
2014-09-24 857-271-5XXX 5000–5999Assigned ONVOY, LLC - MA 892D DORCHESTER 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.