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
BANDWIDTH.COM CLEC, LLC - MT 180
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
2026-08-04 406-233-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MT 994E MILES CITY MT
2026-08-04 406-318-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MT 994E BILLINGS MT
2026-08-04 406-815-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MT 994E RED LODGE MT
2026-08-04 406-953-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MT 994E HARDIN MT
2026-08-04 406-973-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MT 994E SIDNEY MT
2026-08-04 406-997-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MT 994E FROMBERG MT
2026-05-20 406-489-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MT 994E SIDNEY MT
2026-04-10 406-248-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MT 994E BILLINGS MT
2026-04-10 406-318-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MT 994E BILLINGS MT
2026-02-13 406-987-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MT 994E GLENDIVE MT
2025-09-10 406-489-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MT 994E SIDNEY MT
2025-09-02 406-870-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MT 994E GREATFALLS MT
2024-11-13 406-298-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MT 994E COLUMBUS MT
2022-10-19 406-702-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MT 994E BILLINGS MT
2022-10-19 406-831-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MT 994E BILLINGS MT
2022-10-19 406-831-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MT 994E BILLINGS MT
2022-10-19 406-876-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MT 994E BILLINGS MT
2022-09-22 406-970-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MT 994E BILLINGS MT
2022-09-07 406-506-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MT 994E BILLINGS MT
2022-07-14 406-413-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MT 994E BILLINGS MT
2022-02-23 406-333-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MT 994E LIVINGSTON MT
2022-02-21 406-418-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MT 994E COOKE CITY MT
2022-01-26 406-220-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MT 994E LIVINGSTON MT
2022-01-13 406-418-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MT 994E COOKE CITY MT
2022-01-13 406-640-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MT 994E WYELLOWSTN MT
2022-01-13 406-763-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MT 994E GALATNGTWY MT
2022-01-13 406-905-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MT 994E JOLIET MT
2022-01-13 406-936-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MT 994E CLYDE PARK MT
2021-12-07 406-233-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MT 994E MILES CITY MT
2021-11-05 406-220-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MT 994E LIVINGSTON MT
2021-11-05 406-345-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MT 994E GLENDIVE MT
2021-11-05 406-630-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MT 994E SIDNEY MT
2021-10-27 406-919-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MT 994E BELGRADE MT
2021-10-27 406-919-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - MT 994E BELGRADE MT
2021-08-09 406-703-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - MT 994E COLUMBUS MT
2021-06-15 406-919-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MT 994E BELGRADE MT
2021-06-15 406-919-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MT 994E BELGRADE MT
2021-05-13 406-800-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MT 994E BRIDGER MT
2021-05-13 406-813-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MT 994E BELGRADE MT
2020-11-18 406-743-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MT 994E LAUREL MT
2020-10-14 406-624-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MT 994E BOZEMAN MT
2020-10-14 406-624-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MT 994E BOZEMAN MT
2020-07-13 406-298-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MT 994E COLUMBUS MT
2020-07-13 406-602-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MT 994E BOZEMAN MT
2020-07-13 406-602-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MT 994E BOZEMAN MT
2020-07-13 406-602-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MT 994E BOZEMAN MT
2020-05-07 406-282-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MT 994E MANHATTAN MT
2020-04-20 406-351-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - MT 994E FORSYTH MT
2020-04-10 406-312-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - MT 994E BOZEMAN MT
2020-04-10 406-312-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MT 994E BOZEMAN 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.