NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

10 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, last 30 days — NPA 406
T-MOBILE USA, INC. 7
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT 2
NEW CINGULAR WIRELESS PCS, LLC 1
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
2019-12-11 406-747-0XXX 0000–0999Assigned ONVOY, LLC - MT 453F FAIRVIEW MT
2019-12-11 406-747-2XXX 2000–2999Assigned ONVOY, LLC - MT 453F FAIRVIEW MT
2019-12-11 406-780-5XXX 5000–5999Assigned ONVOY, LLC - MT 453F COLUMBUS MT
2019-12-11 406-780-9XXX 9000–9999Assigned ONVOY, LLC - MT 453F COLUMBUS MT
2019-12-11 406-804-6XXX 6000–6999Assigned ONVOY, LLC - MT 453F GARDINER MT
2019-12-11 406-804-7XXX 7000–7999Assigned ONVOY, LLC - MT 453F GARDINER MT
2019-12-11 406-812-8XXX 8000–8999Assigned ONVOY, LLC - MT 453F LAUREL MT
2019-12-11 406-815-6XXX 6000–6999Assigned ONVOY, LLC - MT 453F RED LODGE MT
2019-12-11 406-823-2XXX 2000–2999Assigned ONVOY, LLC - MT 453F LIVINGSTON MT
2019-12-11 406-823-5XXX 5000–5999Assigned ONVOY, LLC - MT 453F LIVINGSTON MT
2019-12-11 406-936-6XXX 6000–6999Assigned ONVOY, LLC - MT 453F CLYDE PARK MT
2019-12-11 406-953-5XXX 5000–5999Assigned ONVOY, LLC - MT 453F HARDIN MT
2019-12-11 406-953-6XXX 6000–6999Assigned ONVOY, LLC - MT 453F HARDIN MT
2019-12-11 406-987-2XXX 2000–2999Assigned ONVOY, LLC - MT 453F GLENDIVE MT
2019-12-11 406-987-3XXX 3000–3999Assigned ONVOY, LLC - MT 453F GLENDIVE MT
2019-12-11 406-998-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MT 994E BILLINGS MT
2019-12-04 406-229-6XXX 6000–6999Assigned ONVOY, LLC - MT 453F CUT BANK MT
2019-12-04 406-302-9XXX 9000–9999Assigned ONVOY, LLC - MT 453F WOLF CREEK MT
2019-12-04 406-308-2XXX 2000–2999Assigned ONVOY, LLC - MT 453F CASCADE MT
2019-12-04 406-308-4XXX 4000–4999Assigned ONVOY, LLC - MT 453F CASCADE MT
2019-12-04 406-313-4XXX 4000–4999Assigned ONVOY, LLC - MT 453F BOULDER MT
2019-12-04 406-344-5XXX 5000–5999Assigned ONVOY, LLC - MT 453F HAVRE MT
2019-12-04 406-344-7XXX 7000–7999Assigned ONVOY, LLC - MT 453F HAVRE MT
2019-12-04 406-380-3XXX 3000–3999Assigned ONVOY, LLC - MT 453F LEWISTOWN MT
2019-12-04 406-420-1XXX 1000–1999Assigned ONVOY, LLC - MT 453F BIGFORK MT
2019-12-04 406-501-6XXX 6000–6999Assigned ONVOY, LLC - MT 453F WHITEHALL MT
2019-12-04 406-645-4XXX 4000–4999Assigned ONVOY, LLC - MT 453F DEER LODGE MT
2019-12-04 406-909-6XXX 6000–6999Assigned ONVOY, LLC - MT 453F COLUMBIFLS MT
2019-11-11 406-312-8XXX 8000–8999Assigned AIRUS, INC. - MT 588H BOZEMAN MT
2019-11-08 406-298-8XXX 8000–8999Assigned TELNYX LLC 073H COLUMBUS MT
2019-11-08 406-624-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BOZEMAN MT
2019-11-04 406-357-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - MT 9415 CHINOOK MT
2019-11-01 406-759-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - MT 9415 CHESTER MT
2019-10-17 406-303-4XXX 4000–4999Assigned ONVOY, LLC - MT 453F MISSOULA MT
2019-10-17 406-430-3XXX 3000–3999Assigned ONVOY, LLC - MT 453F HELENA MT
2019-10-17 406-430-5XXX 5000–5999Assigned ONVOY, LLC - MT 453F HELENA MT
2019-10-17 406-430-7XXX 7000–7999Assigned ONVOY, LLC - MT 453F HELENA MT
2019-10-17 406-430-8XXX 8000–8999Assigned ONVOY, LLC - MT 453F HELENA MT
2019-10-17 406-500-2XXX 2000–2999Assigned ONVOY, LLC - MT 453F BILLINGS MT
2019-10-17 406-500-6XXX 6000–6999Assigned ONVOY, LLC - MT 453F BILLINGS MT
2019-10-17 406-500-7XXX 7000–7999Assigned ONVOY, LLC - MT 453F BILLINGS MT
2019-10-17 406-500-8XXX 8000–8999Assigned ONVOY, LLC - MT 453F BILLINGS MT
2019-10-17 406-500-9XXX 9000–9999Assigned ONVOY, LLC - MT 453F BILLINGS MT
2019-10-17 406-540-0XXX 0000–0999Assigned ONVOY, LLC - MT 453F MISSOULA MT
2019-10-17 406-540-8XXX 8000–8999Assigned ONVOY, LLC - MT 453F MISSOULA MT
2019-10-17 406-540-9XXX 9000–9999Assigned ONVOY, LLC - MT 453F MISSOULA MT
2019-10-17 406-770-2XXX 2000–2999Assigned ONVOY, LLC - MT 453F GREATFALLS MT
2019-10-17 406-770-5XXX 5000–5999Assigned ONVOY, LLC - MT 453F GREATFALLS MT
2019-10-17 406-770-7XXX 7000–7999Assigned ONVOY, LLC - MT 453F GREATFALLS MT
2019-10-17 406-858-3XXX 3000–3999Assigned ONVOY, LLC - MT 453F KALISPELL MT

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.