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
2022-01-27 351-229-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E AMESBURY MA
2022-01-14 351-219-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H DANVERS MA
2022-01-14 351-219-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H DANVERS MA
2022-01-14 351-234-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H HAVERHILL MA
2022-01-14 351-234-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H HAVERHILL MA
2022-01-07 351-688-8XXX 8000–8999Assigned TON80 COMMUNICATIONS, LLC 516J GEORGETOWN MA
2022-01-06 351-344-0XXX 0000–0999Assigned ONVOY, LLC - MA 892D GLOUCESTER MA
2022-01-06 351-344-2XXX 2000–2999Assigned ONVOY, LLC - MA 892D GLOUCESTER MA
2022-01-06 351-352-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H GEORGETOWN MA
2022-01-06 351-352-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H GEORGETOWN MA
2022-01-06 351-837-4XXX 4000–4999Assigned TON80 COMMUNICATIONS, LLC 516J ASHBY MA
2022-01-04 351-355-0XXX 0000–0999Assigned ONVOY SPECTRUM, LLC 624H AMESBURY MA
2021-12-29 351-228-9XXX 9000–9999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F ANDOVER MA
2021-12-29 351-234-1XXX 1000–1999Assigned PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 268F HAVERHILL MA
2021-12-29 351-344-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H GLOUCESTER MA
2021-12-29 351-344-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H GLOUCESTER MA
2021-12-28 351-377-0XXX 0000–0999Assigned ONVOY SPECTRUM, LLC 624H PEABODY MA
2021-12-28 351-377-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H PEABODY MA
2021-12-23 351-221-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H LOWELL MA
2021-12-23 351-221-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H LOWELL MA
2021-12-22 351-227-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H BOLTON MA
2021-12-22 351-227-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H BOLTON MA
2021-12-21 351-371-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H WESTMINSTR MA
2021-12-21 351-371-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H WESTMINSTR MA
2021-12-21 351-465-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H MANCHESTER MA
2021-12-21 351-465-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H MANCHESTER MA
2021-12-20 351-216-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H HAMILTON MA
2021-12-20 351-216-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H HAMILTON MA
2021-12-20 351-217-6XXX 6000–6999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 GLOUCESTER MA
2021-12-20 351-350-2XXX 2000–2999Assigned METROPCS, INC. 5562 IPSWICH MA
2021-12-20 351-350-4XXX 4000–4999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 IPSWICH MA
2021-12-20 351-600-1XXX 1000–1999Assigned METROPCS, INC. 5562 PEABODY MA
2021-12-17 351-226-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H WESTFORD MA
2021-12-16 351-223-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H BEVERLY MA
2021-12-16 351-223-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H BEVERLY MA
2021-12-03 351-220-5XXX 5000–5999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 ACTON MA
2021-12-03 351-220-6XXX 6000–6999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 ACTON MA
2021-12-03 351-220-7XXX 7000–7999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 ACTON MA
2021-12-03 351-220-8XXX 8000–8999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 ACTON MA
2021-12-03 351-220-9XXX 9000–9999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 ACTON MA
2021-12-03 351-228-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E ANDOVER MA
2021-12-02 351-667-2XXX 2000–2999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 ACTON MA
2021-12-02 351-667-3XXX 3000–3999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 ACTON MA
2021-12-02 351-667-9XXX 9000–9999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 ACTON MA
2021-12-01 351-217-5XXX 5000–5999Assigned OMNIPOINT MIAMI E LICENSE, LLC 6889 GLOUCESTER MA
2021-11-23 351-355-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MA 990E AMESBURY MA
2021-11-11 351-234-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MA 6387 HAVERHILL MA
2021-11-09 351-227-7XXX 7000–7999Assigned ONVOY, LLC - MA 892D BOLTON MA
2021-11-08 351-213-6XXX 6000–6999Assigned ONVOY, LLC - MA 892D TEMPLETON MA
2021-11-08 351-213-7XXX 7000–7999Assigned ONVOY, LLC - MA 892D TEMPLETON 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.