NumberResearch Membership · Data 09/21/2026

Recent thousands-block assignments

0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/21/2026

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 SPECTRUM, LLC 74
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
2025-09-15 351-240-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H LAWRENCE MA
2022-02-22 351-588-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H HAVERHILL MA
2022-02-22 351-588-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H HAVERHILL MA
2022-02-16 351-350-0XXX 0000–0999Assigned ONVOY SPECTRUM, LLC 624H IPSWICH MA
2022-02-16 351-350-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H IPSWICH MA
2022-01-28 351-354-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H LUNENBURG 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
2022-01-06 351-352-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H GEORGETOWN MA
2022-01-06 351-352-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H GEORGETOWN MA
2022-01-04 351-355-0XXX 0000–0999Assigned ONVOY SPECTRUM, LLC 624H AMESBURY 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
2021-12-17 351-226-5XXX 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
2021-11-02 351-210-9XXX 9000–9999Assigned ONVOY SPECTRUM, LLC 624H HUDSON MA
2021-11-02 351-212-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H DANVERS MA
2021-11-02 351-212-9XXX 9000–9999Assigned ONVOY SPECTRUM, LLC 624H DANVERS MA
2021-11-02 351-251-0XXX 0000–0999Assigned ONVOY SPECTRUM, LLC 624H GROTON MA
2021-11-02 351-251-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H GROTON MA
2021-11-02 351-345-0XXX 0000–0999Assigned ONVOY SPECTRUM, LLC 624H HUDSON MA
2021-11-02 351-357-0XXX 0000–0999Assigned ONVOY SPECTRUM, LLC 624H ORANGE MA
2021-11-02 351-357-9XXX 9000–9999Assigned ONVOY SPECTRUM, LLC 624H ORANGE MA
2021-11-02 351-358-0XXX 0000–0999Assigned ONVOY SPECTRUM, LLC 624H PEPPERELL MA
2021-11-02 351-667-0XXX 0000–0999Assigned ONVOY SPECTRUM, LLC 624H ACTON MA
2021-11-02 351-667-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H ACTON MA
2021-10-21 351-225-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H BERLIN MA
2021-10-21 351-225-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H BERLIN MA
2021-10-21 351-234-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H HAVERHILL MA
2021-10-21 351-234-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H HAVERHILL MA
2021-10-21 351-252-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H ROWLEY MA
2021-10-21 351-252-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H ROWLEY MA
2021-10-21 351-359-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H SHIRLEY MA
2021-10-21 351-359-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H SHIRLEY MA
2021-08-04 351-253-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H ATHOLFKLN MA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.