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 406
AIRUS, INC. - MT 26
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
2025-04-16 406-703-7XXX 7000–7999Assigned AIRUS, INC. - MT 588H COLUMBUS MT
2023-09-25 406-965-1XXX 1000–1999Assigned AIRUS, INC. - MT 588H GREATFALLS MT
2021-03-26 406-602-9XXX 9000–9999Assigned AIRUS, INC. - MT 588H BOZEMAN MT
2021-02-08 406-635-1XXX 1000–1999Assigned AIRUS, INC. - MT 588H TERRY MT
2021-02-08 406-852-9XXX 9000–9999Assigned AIRUS, INC. - MT 588H MILES CITY MT
2020-06-26 406-321-8XXX 8000–8999Assigned AIRUS, INC. - MT 588H COLUMBUS MT
2020-03-03 406-602-1XXX 1000–1999Assigned AIRUS, INC. - MT 588H BOZEMAN MT
2020-03-03 406-630-9XXX 9000–9999Assigned AIRUS, INC. - MT 588H SIDNEY MT
2020-03-03 406-998-5XXX 5000–5999Assigned AIRUS, INC. - MT 588H BILLINGS MT
2020-02-21 406-359-8XXX 8000–8999Assigned AIRUS, INC. - MT 588H GLENDIVE MT
2020-02-06 406-944-9XXX 9000–9999Assigned AIRUS, INC. - MT 588H MILES CITY MT
2020-02-06 406-957-1XXX 1000–1999Assigned AIRUS, INC. - MT 588H TERRY MT
2019-11-11 406-312-8XXX 8000–8999Assigned AIRUS, INC. - MT 588H BOZEMAN MT
2019-10-08 406-944-8XXX 8000–8999Assigned AIRUS, INC. - MT 588H MILES CITY MT
2019-04-17 406-637-8XXX 8000–8999Assigned AIRUS, INC. - MT 588H TERRY MT
2019-04-05 406-312-1XXX 1000–1999Assigned AIRUS, INC. - MT 588H BOZEMAN MT
2019-04-05 406-998-2XXX 2000–2999Assigned AIRUS, INC. - MT 588H BILLINGS MT
2018-02-15 406-345-1XXX 1000–1999Assigned AIRUS, INC. - MT 588H GLENDIVE MT
2018-02-06 406-630-8XXX 8000–8999Assigned AIRUS, INC. - MT 588H SIDNEY MT
2018-02-06 406-635-8XXX 8000–8999Assigned AIRUS, INC. - MT 588H TERRY MT
2018-02-06 406-851-9XXX 9000–9999Assigned AIRUS, INC. - MT 588H MILES CITY MT
2018-02-02 406-577-0XXX 0000–0999Assigned AIRUS, INC. - MT 588H BOZEMAN MT
2018-01-31 406-998-0XXX 0000–0999Assigned AIRUS, INC. - MT 588H BILLINGS MT
2017-07-03 406-601-3XXX 3000–3999Assigned AIRUS, INC. - MT 588H BILLINGS MT
2017-03-13 406-413-9XXX 9000–9999Assigned AIRUS, INC. - MT 588H BILLINGS MT
2015-08-26 406-998-1XXX 1000–1999Assigned AIRUS, INC. - MT 588H BILLINGS MT

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.