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
2014-09-24 857-323-5XXX 5000–5999Assigned ONVOY, LLC - MA 892D CHELSEA MA
2014-09-24 857-323-6XXX 6000–6999Assigned ONVOY, LLC - MA 892D CHELSEA MA
2014-09-19 857-293-6XXX 6000–6999Assigned ONVOY, LLC - MA 892D EASTBOSTON MA
2014-09-19 857-293-7XXX 7000–7999Assigned ONVOY, LLC - MA 892D EASTBOSTON MA
2014-09-19 857-829-4XXX 4000–4999Assigned ONVOY, LLC - MA 892D CAMBRIDGE MA
2014-09-19 857-829-6XXX 6000–6999Assigned ONVOY, LLC - MA 892D CAMBRIDGE MA
2014-09-17 857-308-6XXX 6000–6999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 ROXBURY MA
2014-09-17 857-308-7XXX 7000–7999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 ROXBURY MA
2014-09-17 857-308-8XXX 8000–8999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 ROXBURY MA
2014-09-17 857-308-9XXX 9000–9999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 ROXBURY MA
2014-09-16 857-302-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E BOSTON MA
2014-09-16 857-302-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E BOSTON MA
2014-09-16 857-302-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E BOSTON MA
2014-09-16 857-302-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E BOSTON MA
2014-09-16 857-302-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E BOSTON MA
2014-09-16 857-323-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E CHELSEA MA
2014-09-16 857-626-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E BELMONT MA
2014-09-16 857-626-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E BELMONT MA
2014-09-10 857-930-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BOSTON MA
2014-09-10 857-930-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BOSTON MA
2014-09-09 857-304-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J WATERTOWN MA
2014-09-09 857-415-7XXX 7000–7999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2014-09-09 857-415-8XXX 8000–8999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2014-09-09 857-415-9XXX 9000–9999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2014-09-09 857-576-7XXX 7000–7999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BROOKLINE MA
2014-09-09 857-930-0XXX 0000–0999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2014-09-09 857-930-1XXX 1000–1999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2014-09-09 857-930-8XXX 8000–8999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2014-09-09 857-930-9XXX 9000–9999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 BOSTON MA
2014-09-05 857-576-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J BROOKLINE MA
2014-09-02 857-305-6XXX 6000–6999Assigned ONVOY, LLC - MA 892D BOSTON MA
2014-09-02 857-305-7XXX 7000–7999Assigned ONVOY, LLC - MA 892D BOSTON MA
2014-08-29 857-703-1XXX 1000–1999Assigned ONVOY, LLC - MA 892D HYDE PARK MA
2014-08-29 857-703-2XXX 2000–2999Assigned ONVOY, LLC - MA 892D HYDE PARK MA
2014-08-26 857-226-8XXX 8000–8999Assigned ONVOY, LLC - MA 892D NEWTON MA
2014-08-26 857-226-9XXX 9000–9999Assigned ONVOY, LLC - MA 892D NEWTON MA
2014-08-25 857-816-7XXX 7000–7999Assigned ONVOY, LLC - MA 892D WINTHROP MA
2014-08-25 857-816-8XXX 8000–8999Assigned ONVOY, LLC - MA 892D WINTHROP MA
2014-08-21 857-248-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2014-08-21 857-260-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2014-08-21 857-303-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 BOSTON MA
2014-08-21 857-304-0XXX 0000–0999Assigned ONVOY, LLC - MA 892D WATERTOWN MA
2014-08-21 857-576-5XXX 5000–5999Assigned ONVOY, LLC - MA 892D BROOKLINE MA
2014-08-21 857-997-9XXX 9000–9999Assigned ONVOY, LLC - MA 892D SOMERVILLE MA
2014-08-20 857-267-5XXX 5000–5999Assigned ONVOY, LLC - MA 892D MILTON MA
2014-08-20 857-401-8XXX 8000–8999Assigned ONVOY, LLC - MA 892D SO BOSTON MA
2014-08-19 857-999-4XXX 4000–4999Assigned ONVOY, LLC - MA 892D CAMBRIDGE MA
2014-08-06 857-701-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 ROXBURY MA
2014-08-05 857-285-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J CAMBRIDGE MA
2014-08-05 857-302-1XXX 1000–1999Assigned AIRUS, INC. - MA 428H 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.