NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

0 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, 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
2021-04-01 351-357-5XXX 5000–5999Assigned ONVOY, LLC - MA 892D ORANGE MA
2021-04-01 351-358-5XXX 5000–5999Assigned ONVOY, LLC - MA 892D PEPPERELL MA
2021-04-01 351-359-5XXX 5000–5999Assigned ONVOY, LLC - MA 892D SHIRLEY MA
2021-03-23 351-217-2XXX 2000–2999Assigned ONVOY, LLC - MA 892D GLOUCESTER MA
2021-03-23 351-217-3XXX 3000–3999Assigned ONVOY, LLC - MA 892D GLOUCESTER MA
2021-03-23 351-217-4XXX 4000–4999Assigned ONVOY, LLC - MA 892D GLOUCESTER MA
2021-03-23 351-356-1XXX 1000–1999Assigned ONVOY, LLC - MA 892D LEOMINSTER MA
2021-03-23 351-356-2XXX 2000–2999Assigned ONVOY, LLC - MA 892D LEOMINSTER MA
2021-03-23 351-400-2XXX 2000–2999Assigned ONVOY, LLC - MA 892D ESSEX MA
2021-03-18 351-352-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H GEORGETOWN MA
2021-03-18 351-355-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H AMESBURY MA
2021-03-18 351-361-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H ASHBY MA
2021-03-18 351-388-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H HARVARD MA
2021-03-18 351-501-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H HUBBARDSTN MA
2021-03-16 351-203-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H TYNGSBORO MA
2021-03-16 351-213-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H TEMPLETON MA
2021-03-16 351-800-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H WINCHENDON MA
2021-03-15 351-214-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H ROCKPORT MA
2021-03-15 351-600-7XXX 7000–7999Assigned ONVOY SPECTRUM, LLC 624H PEABODY MA
2021-03-12 351-529-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H MERRIMAC MA
2021-03-11 351-215-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - DC 4036 HAVERHILL MA
2021-03-10 351-210-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H HUDSON MA
2021-03-10 351-215-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H HAVERHILL MA
2021-03-10 351-216-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H HAMILTON MA
2021-03-10 351-217-7XXX 7000–7999Assigned ONVOY SPECTRUM, LLC 624H GLOUCESTER MA
2021-03-10 351-356-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H LEOMINSTER MA
2021-03-10 351-500-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H LOWELL MA
2021-03-09 351-212-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H DANVERS MA
2021-03-09 351-400-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H ESSEX MA
2021-02-26 351-217-9XXX 9000–9999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 GLOUCESTER MA
2021-02-09 351-210-4XXX 4000–4999Assigned ONVOY, LLC - MA 892D HUDSON MA
2021-02-09 351-210-5XXX 5000–5999Assigned ONVOY, LLC - MA 892D HUDSON MA
2021-02-09 351-777-4XXX 4000–4999Assigned ONVOY, LLC - MA 892D HUBBARDSTN MA
2021-02-05 351-203-3XXX 3000–3999Assigned ONVOY, LLC - MA 892D TYNGSBORO MA
2021-02-05 351-203-4XXX 4000–4999Assigned ONVOY, LLC - MA 892D TYNGSBORO MA
2021-02-05 351-213-2XXX 2000–2999Assigned ONVOY, LLC - MA 892D TEMPLETON MA
2021-02-05 351-213-3XXX 3000–3999Assigned ONVOY, LLC - MA 892D TEMPLETON MA
2021-02-05 351-216-5XXX 5000–5999Assigned ONVOY, LLC - MA 892D HAMILTON MA
2021-02-05 351-216-6XXX 6000–6999Assigned ONVOY, LLC - MA 892D HAMILTON MA
2021-02-05 351-247-1XXX 1000–1999Assigned ONVOY, LLC - MA 892D LUNENBURG MA
2021-02-05 351-247-9XXX 9000–9999Assigned ONVOY, LLC - MA 892D LUNENBURG MA
2021-02-05 351-529-1XXX 1000–1999Assigned ONVOY, LLC - MA 892D MERRIMAC MA
2021-02-05 351-529-2XXX 2000–2999Assigned ONVOY, LLC - MA 892D MERRIMAC MA
2021-02-05 351-800-6XXX 6000–6999Assigned ONVOY, LLC - MA 892D WINCHENDON MA
2021-02-05 351-800-7XXX 7000–7999Assigned ONVOY, LLC - MA 892D WINCHENDON MA
2021-02-05 351-900-1XXX 1000–1999Assigned ONVOY, LLC - MA 892D IPSWICH MA
2021-02-05 351-900-2XXX 2000–2999Assigned ONVOY, LLC - MA 892D IPSWICH MA
2021-02-02 351-204-0XXX 0000–0999Assigned TELNYX LLC 073H LAWRENCE MA
2021-02-02 351-210-8XXX 8000–8999Assigned TELNYX LLC 073H HUDSON MA
2021-02-02 351-356-0XXX 0000–0999Assigned TELNYX LLC 073H LEOMINSTER 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.