NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

0 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, all time — NPA 351
ONVOY, LLC - MA 285
OMNIPOINT MIAMI E LICENSE, LLC 83
ONVOY SPECTRUM, LLC 74
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 40
PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 37
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
2020-03-03 351-209-2XXX 2000–2999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 ACTON MA
2020-02-21 351-212-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J DANVERS MA
2020-02-18 351-208-1XXX 1000–1999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F LOWELL MA
2020-02-12 351-204-2XXX 2000–2999Assigned PAETEC ITEL, LLC 829J LAWRENCE MA
2020-02-10 351-222-1XXX 1000–1999Assigned ONVOY, LLC - MA 892D MERRIMAC MA
2020-02-10 351-222-4XXX 4000–4999Assigned ONVOY, LLC - MA 892D MERRIMAC MA
2020-02-10 351-222-5XXX 5000–5999Assigned ONVOY, LLC - MA 892D MERRIMAC MA
2020-02-10 351-222-6XXX 6000–6999Assigned ONVOY, LLC - MA 892D MERRIMAC MA
2020-02-10 351-222-7XXX 7000–7999Assigned ONVOY, LLC - MA 892D MERRIMAC MA
2020-02-10 351-222-8XXX 8000–8999Assigned ONVOY, LLC - MA 892D MERRIMAC MA
2020-02-10 351-222-9XXX 9000–9999Assigned ONVOY, LLC - MA 892D MERRIMAC MA
2020-02-10 351-300-2XXX 2000–2999Assigned ONVOY, LLC - MA 892D HARVARD MA
2020-02-10 351-300-4XXX 4000–4999Assigned ONVOY, LLC - MA 892D HARVARD MA
2020-02-10 351-300-5XXX 5000–5999Assigned ONVOY, LLC - MA 892D HARVARD MA
2020-02-10 351-300-6XXX 6000–6999Assigned ONVOY, LLC - MA 892D HARVARD MA
2020-02-10 351-300-7XXX 7000–7999Assigned ONVOY, LLC - MA 892D HARVARD MA
2020-02-10 351-300-8XXX 8000–8999Assigned ONVOY, LLC - MA 892D HARVARD MA
2020-02-10 351-300-9XXX 9000–9999Assigned ONVOY, LLC - MA 892D HARVARD MA
2020-02-10 351-666-2XXX 2000–2999Assigned ONVOY, LLC - MA 892D PEABODY MA
2020-02-10 351-666-3XXX 3000–3999Assigned ONVOY, LLC - MA 892D PEABODY MA
2020-02-10 351-666-4XXX 4000–4999Assigned ONVOY, LLC - MA 892D PEABODY MA
2020-02-10 351-666-5XXX 5000–5999Assigned ONVOY, LLC - MA 892D PEABODY MA
2020-01-22 351-209-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 ACTON MA
2019-12-03 351-200-2XXX 2000–2999Assigned TELNYX LLC 073H ASHBY MA
2019-12-02 351-215-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HAVERHILL MA
2019-11-13 351-210-0XXX 0000–0999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 HUDSON MA
2019-11-13 351-210-2XXX 2000–2999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 HUDSON MA
2019-11-06 351-222-0XXX 0000–0999Assigned TELNYX LLC 073H MERRIMAC MA
2019-11-06 351-300-1XXX 1000–1999Assigned TELNYX LLC 073H HARVARD MA
2019-10-11 351-222-2XXX 2000–2999Assigned ONVOY, LLC - MA 892D MERRIMAC MA
2019-10-11 351-222-3XXX 3000–3999Assigned ONVOY, LLC - MA 892D MERRIMAC MA
2019-10-11 351-300-0XXX 0000–0999Assigned ONVOY, LLC - MA 892D HARVARD MA
2019-10-11 351-300-3XXX 3000–3999Assigned ONVOY, LLC - MA 892D HARVARD MA
2019-10-10 351-214-0XXX 0000–0999Assigned VONAGE AMERICA LLC 197D ROCKPORT MA
2019-09-13 351-247-2XXX 2000–2999Assigned ONVOY, LLC - MA 892D LUNENBURG MA
2019-09-10 351-210-1XXX 1000–1999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 HUDSON MA
2019-08-28 351-200-1XXX 1000–1999Assigned TELNYX LLC 073H ASHBY MA
2019-08-27 351-247-0XXX 0000–0999Assigned TELNYX LLC 073H LUNENBURG MA
2019-07-16 351-209-9XXX 9000–9999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 ACTON MA
2019-06-26 351-212-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E DANVERS MA
2019-06-20 351-209-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 ACTON MA
2019-06-17 351-666-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 PEABODY MA
2019-06-05 351-444-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J IPSWICH MA
2019-06-03 351-666-8XXX 8000–8999Assigned ONVOY, LLC - MA 892D PEABODY MA
2019-05-17 351-203-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E TYNGSBORO MA
2019-05-16 351-212-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E DANVERS MA
2019-03-27 351-204-1XXX 1000–1999Assigned IP HORIZON LLC 515J LAWRENCE MA
2019-03-27 351-247-6XXX 6000–6999Assigned TC SYSTEMS, INC. 7135 LUNENBURG MA
2019-03-18 351-204-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J LAWRENCE MA
2019-02-22 351-209-1XXX 1000–1999Assigned EXIANT COMMUNICATIONS LLC 114J ACTON 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.