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 435
ONVOY SPECTRUM, LLC 46
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
2025-04-22 435-317-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H LOGAN UT
2025-04-22 435-361-7XXX 7000–7999Assigned ONVOY SPECTRUM, LLC 624H LOGAN UT
2025-04-22 435-534-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H LOGAN UT
2024-12-26 435-244-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H TOOELE UT
2024-12-26 435-271-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H SALINA UT
2024-12-26 435-324-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H HEBER CITY UT
2024-12-26 435-341-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H MONROE UT
2024-12-26 435-361-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H LOGAN UT
2024-12-26 435-567-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H RICHFIELD UT
2024-12-26 435-681-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H NEPHI UT
2024-09-17 435-221-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H BEAVER UT
2024-09-17 435-221-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H BEAVER UT
2024-09-17 435-421-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H BEAVER UT
2021-11-10 435-667-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H BRIGHAM CY UT
2021-11-10 435-667-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H BRIGHAM CY UT
2021-11-10 435-699-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H PARK CITY UT
2021-11-10 435-699-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H PARK CITY UT
2021-11-10 435-701-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H CEDAR CITY UT
2021-11-10 435-708-9XXX 9000–9999Assigned ONVOY SPECTRUM, LLC 624H CEDAR CITY UT
2021-10-27 435-261-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H BEAVER UT
2021-10-27 435-261-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H BEAVER UT
2021-10-27 435-276-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H BLANDING UT
2021-10-27 435-276-7XXX 7000–7999Assigned ONVOY SPECTRUM, LLC 624H BLANDING UT
2021-10-27 435-281-7XXX 7000–7999Assigned ONVOY SPECTRUM, LLC 624H WASATCH UT
2021-10-27 435-281-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H WASATCH UT
2021-10-27 435-303-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H BEARRIV CY UT
2021-10-27 435-303-7XXX 7000–7999Assigned ONVOY SPECTRUM, LLC 624H BEARRIV CY UT
2021-10-27 435-309-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H GLNCNYONCY UT
2021-10-27 435-309-6XXX 6000–6999Assigned ONVOY SPECTRUM, LLC 624H GLNCNYONCY UT
2021-10-27 435-356-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H DELTA UT
2021-10-27 435-356-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H DELTA UT
2021-10-27 435-547-1XXX 1000–1999Assigned ONVOY SPECTRUM, LLC 624H BRIAN HEAD UT
2021-10-27 435-547-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H BRIAN HEAD UT
2021-06-25 435-309-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H GLNCNYONCY UT
2021-06-24 435-276-2XXX 2000–2999Assigned ONVOY SPECTRUM, LLC 624H BLANDING UT
2021-06-24 435-295-7XXX 7000–7999Assigned ONVOY SPECTRUM, LLC 624H BRIGHAM CY UT
2021-06-24 435-303-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H BEARRIV CY UT
2021-06-24 435-421-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H BEAVER UT
2021-06-24 435-500-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H DELTA UT
2021-06-24 435-531-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H CEDAR CITY UT
2021-06-24 435-547-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H BRIAN HEAD UT
2021-06-23 435-281-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H WASATCH UT
2021-04-26 435-355-8XXX 8000–8999Assigned ONVOY SPECTRUM, LLC 624H MOAB UT
2020-06-18 435-666-3XXX 3000–3999Assigned ONVOY SPECTRUM, LLC 624H PARK CITY UT
2020-06-18 435-666-4XXX 4000–4999Assigned ONVOY SPECTRUM, LLC 624H PARK CITY UT
2020-06-18 435-666-5XXX 5000–5999Assigned ONVOY SPECTRUM, LLC 624H PARK CITY UT

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.