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
2021-06-11 351-353-1XXX 1000–1999Assigned ONVOY, LLC - MA 892D HAVERHILL MA
2021-06-11 351-353-2XXX 2000–2999Assigned ONVOY, LLC - MA 892D HAVERHILL MA
2021-06-11 351-353-3XXX 3000–3999Assigned ONVOY, LLC - MA 892D HAVERHILL MA
2021-06-11 351-353-4XXX 4000–4999Assigned ONVOY, LLC - MA 892D HAVERHILL MA
2021-06-11 351-357-7XXX 7000–7999Assigned ONVOY, LLC - MA 892D ORANGE MA
2021-06-11 351-357-8XXX 8000–8999Assigned ONVOY, LLC - MA 892D ORANGE MA
2021-06-11 351-358-7XXX 7000–7999Assigned ONVOY, LLC - MA 892D PEPPERELL MA
2021-06-11 351-358-8XXX 8000–8999Assigned ONVOY, LLC - MA 892D PEPPERELL MA
2021-06-11 351-359-3XXX 3000–3999Assigned ONVOY, LLC - MA 892D SHIRLEY MA
2021-06-11 351-359-4XXX 4000–4999Assigned ONVOY, LLC - MA 892D SHIRLEY MA
2021-06-11 351-371-7XXX 7000–7999Assigned ONVOY, LLC - MA 892D WESTMINSTR MA
2021-06-11 351-371-8XXX 8000–8999Assigned ONVOY, LLC - MA 892D WESTMINSTR MA
2021-06-11 351-400-6XXX 6000–6999Assigned ONVOY, LLC - MA 892D ESSEX MA
2021-06-11 351-465-5XXX 5000–5999Assigned ONVOY, LLC - MA 892D MANCHESTER MA
2021-06-11 351-465-6XXX 6000–6999Assigned ONVOY, LLC - MA 892D MANCHESTER MA
2021-06-11 351-501-2XXX 2000–2999Assigned ONVOY, LLC - MA 892D HUBBARDSTN MA
2021-06-11 351-600-2XXX 2000–2999Assigned ONVOY, LLC - MA 892D PEABODY MA
2021-06-11 351-600-4XXX 4000–4999Assigned ONVOY, LLC - MA 892D PEABODY MA
2021-06-11 351-600-8XXX 8000–8999Assigned ONVOY, LLC - MA 892D PEABODY MA
2021-06-03 351-353-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 HAVERHILL MA
2021-05-18 351-203-6XXX 6000–6999Assigned ONVOY, LLC - MA 892D TYNGSBORO MA
2021-05-18 351-203-7XXX 7000–7999Assigned ONVOY, LLC - MA 892D TYNGSBORO MA
2021-05-18 351-251-1XXX 1000–1999Assigned ONVOY, LLC - MA 892D GROTON MA
2021-05-18 351-251-2XXX 2000–2999Assigned ONVOY, LLC - MA 892D GROTON MA
2021-05-18 351-355-1XXX 1000–1999Assigned ONVOY, LLC - MA 892D AMESBURY MA
2021-05-18 351-355-2XXX 2000–2999Assigned ONVOY, LLC - MA 892D AMESBURY MA
2021-05-05 351-208-4XXX 4000–4999Assigned VONAGE AMERICA LLC 197D LOWELL MA
2021-05-05 351-208-5XXX 5000–5999Assigned VONAGE AMERICA LLC 197D LOWELL MA
2021-04-26 351-345-6XXX 6000–6999Assigned FRACTEL, LLC 965H HUDSON MA
2021-04-26 351-465-8XXX 8000–8999Assigned FRACTEL, LLC 965H MANCHESTER MA
2021-04-16 351-208-7XXX 7000–7999Assigned ONVOY, LLC - MA 892D LOWELL MA
2021-04-16 351-253-3XXX 3000–3999Assigned ONVOY, LLC - MA 892D ATHOLFKLN MA
2021-04-16 351-355-6XXX 6000–6999Assigned ONVOY, LLC - MA 892D AMESBURY MA
2021-04-16 351-355-7XXX 7000–7999Assigned ONVOY, LLC - MA 892D AMESBURY MA
2021-04-16 351-361-0XXX 0000–0999Assigned TELNYX LLC 073H ASHBY MA
2021-04-16 351-361-1XXX 1000–1999Assigned ONVOY, LLC - MA 892D ASHBY MA
2021-04-16 351-371-1XXX 1000–1999Assigned ONVOY, LLC - MA 892D WESTMINSTR MA
2021-04-16 351-371-2XXX 2000–2999Assigned ONVOY, LLC - MA 892D WESTMINSTR MA
2021-04-16 351-500-1XXX 1000–1999Assigned ONVOY, LLC - MA 892D LOWELL MA
2021-04-16 351-500-2XXX 2000–2999Assigned ONVOY, LLC - MA 892D LOWELL MA
2021-04-16 351-500-3XXX 3000–3999Assigned ONVOY, LLC - MA 892D LOWELL MA
2021-04-08 351-218-0XXX 0000–0999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 ACTON MA
2021-04-08 351-218-1XXX 1000–1999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 ACTON MA
2021-04-08 351-218-9XXX 9000–9999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 ACTON MA
2021-04-07 351-354-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H LUNENBURG MA
2021-04-02 351-371-3XXX 3000–3999Assigned ONVOY, LLC - MA 892D WESTMINSTR MA
2021-04-01 351-251-5XXX 5000–5999Assigned ONVOY, LLC - MA 892D GROTON MA
2021-04-01 351-253-5XXX 5000–5999Assigned ONVOY, LLC - MA 892D ATHOLFKLN MA
2021-04-01 351-353-5XXX 5000–5999Assigned ONVOY, LLC - MA 892D HAVERHILL MA
2021-04-01 351-354-5XXX 5000–5999Assigned ONVOY, LLC - MA 892D LUNENBURG 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.