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
2021-02-09 406-886-6XXX 6000–6999Assigned ONVOY, LLC - MT 453F SWAN LAKE MT
2021-02-09 406-886-8XXX 8000–8999Assigned ONVOY, LLC - MT 453F SWAN LAKE MT
2021-02-09 406-887-6XXX 6000–6999Assigned ONVOY, LLC - MT 453F FINLEY PT MT
2021-02-09 406-887-8XXX 8000–8999Assigned ONVOY, LLC - MT 453F FINLEY PT MT
2021-02-09 406-888-0XXX 0000–0999Assigned ONVOY, LLC - MT 453F W GLACIER MT
2021-02-09 406-919-1XXX 1000–1999Assigned ONVOY, LLC - MT 453F BELGRADE MT
2021-02-09 406-919-2XXX 2000–2999Assigned ONVOY, LLC - MT 453F BELGRADE MT
2021-02-09 406-936-2XXX 2000–2999Assigned ONVOY, LLC - MT 453F CLYDE PARK MT
2021-02-09 406-936-5XXX 5000–5999Assigned ONVOY, LLC - MT 453F CLYDE PARK MT
2021-02-09 406-943-1XXX 1000–1999Assigned ONVOY, LLC - MT 453F SIDNEY MT
2021-02-09 406-943-2XXX 2000–2999Assigned ONVOY, LLC - MT 453F SIDNEY MT
2021-02-09 406-953-2XXX 2000–2999Assigned ONVOY, LLC - MT 453F HARDIN MT
2021-02-09 406-953-3XXX 3000–3999Assigned ONVOY, LLC - MT 453F HARDIN MT
2021-02-09 406-957-2XXX 2000–2999Assigned ONVOY, LLC - MT 453F TERRY MT
2021-02-09 406-966-5XXX 5000–5999Assigned ONVOY, LLC - MT 453F SHELBY MT
2021-02-09 406-966-6XXX 6000–6999Assigned ONVOY, LLC - MT 453F SHELBY MT
2021-02-09 406-980-6XXX 6000–6999Assigned ONVOY, LLC - MT 453F TOWNSEND MT
2021-02-09 406-988-6XXX 6000–6999Assigned ONVOY, LLC - MT 453F DILLON MT
2021-02-09 406-988-8XXX 8000–8999Assigned ONVOY, LLC - MT 453F DILLON MT
2021-02-08 406-631-5XXX 5000–5999Assigned ONVOY, LLC - MT 453F ELMO MT
2021-02-08 406-631-9XXX 9000–9999Assigned ONVOY, LLC - MT 453F ELMO MT
2021-02-08 406-635-1XXX 1000–1999Assigned AIRUS, INC. - MT 588H TERRY MT
2021-02-08 406-641-8XXX 8000–8999Assigned ONVOY, LLC - MT 453F WYELLOWSTN MT
2021-02-08 406-641-9XXX 9000–9999Assigned ONVOY, LLC - MT 453F WYELLOWSTN MT
2021-02-08 406-852-9XXX 9000–9999Assigned AIRUS, INC. - MT 588H MILES CITY MT
2021-02-03 406-315-0XXX 0000–0999Assigned TELNYX LLC 073H GREATFALLS MT
2021-01-28 406-519-4XXX 4000–4999Assigned ONVOY, LLC - MT 453F MISSOULA MT
2021-01-28 406-519-5XXX 5000–5999Assigned ONVOY, LLC - MT 453F MISSOULA MT
2021-01-28 406-849-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 ELMO MT
2021-01-28 406-849-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 ELMO MT
2021-01-25 406-215-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 MISSOULA MT
2021-01-25 406-218-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 MISSOULA MT
2021-01-25 406-341-3XXX 3000–3999Assigned ONVOY, LLC - MT 453F MANHATTAN MT
2021-01-25 406-341-6XXX 6000–6999Assigned ONVOY, LLC - MT 453F MANHATTAN MT
2021-01-25 406-341-7XXX 7000–7999Assigned ONVOY, LLC - MT 453F MANHATTAN MT
2021-01-25 406-341-8XXX 8000–8999Assigned ONVOY, LLC - MT 453F MANHATTAN MT
2021-01-25 406-341-9XXX 9000–9999Assigned ONVOY SPECTRUM, LLC 624H MANHATTAN MT
2021-01-22 406-317-5XXX 5000–5999Assigned ONVOY, LLC - MT 453F MISSOULA MT
2021-01-22 406-317-6XXX 6000–6999Assigned ONVOY, LLC - MT 453F MISSOULA MT
2021-01-22 406-317-8XXX 8000–8999Assigned ONVOY, LLC - MT 453F MISSOULA MT
2021-01-22 406-317-9XXX 9000–9999Assigned ONVOY, LLC - MT 453F MISSOULA MT
2021-01-12 406-295-0XXX 0000–0999Assigned ONVOY, LLC - MT 453F TROY MT
2021-01-12 406-296-8XXX 8000–8999Assigned ONVOY, LLC - MT 453F EUREKA MT
2021-01-12 406-296-9XXX 9000–9999Assigned ONVOY, LLC - MT 453F EUREKA MT
2021-01-12 406-321-5XXX 5000–5999Assigned ONVOY, LLC - MT 453F COLUMBUS MT
2021-01-12 406-321-6XXX 6000–6999Assigned ONVOY, LLC - MT 453F COLUMBUS MT
2021-01-12 406-501-8XXX 8000–8999Assigned ONVOY, LLC - MT 453F WHITEHALL MT
2021-01-12 406-501-9XXX 9000–9999Assigned ONVOY, LLC - MT 453F WHITEHALL MT
2021-01-12 406-505-2XXX 2000–2999Assigned ONVOY, LLC - MT 453F CONRAD MT
2021-01-12 406-505-3XXX 3000–3999Assigned ONVOY, LLC - MT 453F CONRAD 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.