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

Recent thousands-block assignments
Assigned	Thousands-block	Last 4 digits	Status	Assignee	OCN	Rate center	State
2020-07-20	406-820-9XXX	9000–9999	Assigned	TELNYX LLC	073H	OLNEY	MT
2020-07-20	406-854-0XXX	0000–0999	Assigned	TELNYX LLC	073H	MARION	MT
2020-07-20	406-857-0XXX	0000–0999	Assigned	TELNYX LLC	073H	SOMERS	MT
2020-07-20	406-888-3XXX	3000–3999	Assigned	TELNYX LLC	073H	W GLACIER	MT
2020-07-20	406-952-7XXX	7000–7999	Assigned	ONVOY SPECTRUM, LLC	624H	GREATFALLS	MT
2020-07-20	406-952-8XXX	8000–8999	Assigned	ONVOY SPECTRUM, LLC	624H	GREATFALLS	MT
2020-07-20	406-952-9XXX	9000–9999	Assigned	ONVOY SPECTRUM, LLC	624H	GREATFALLS	MT
2020-07-16	406-226-1XXX	1000–1999	Assigned	TELNYX LLC	073H	EGLACIERPK	MT
2020-07-16	406-476-0XXX	0000–0999	Assigned	TELNYX LLC	073H	DUTTON	MT
2020-07-16	406-571-9XXX	9000–9999	Assigned	TELNYX LLC	073H	FINLEY PT	MT
2020-07-16	406-631-0XXX	0000–0999	Assigned	TELNYX LLC	073H	ELMO	MT
2020-07-15	406-602-8XXX	8000–8999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - MT	9415	BOZEMAN	MT
2020-07-14	406-221-8XXX	8000–8999	Assigned	TELNYX LLC	073H	BUTTE	MT
2020-07-14	406-308-0XXX	0000–0999	Assigned	TELNYX LLC	073H	CASCADE	MT
2020-07-14	406-313-9XXX	9000–9999	Assigned	TELNYX LLC	073H	BOULDER	MT
2020-07-14	406-415-9XXX	9000–9999	Assigned	TELNYX LLC	073H	DEER LODGE	MT
2020-07-14	406-505-1XXX	1000–1999	Assigned	TELNYX LLC	073H	CONRAD	MT
2020-07-14	406-559-8XXX	8000–8999	Assigned	TELNYX LLC	073H	ANACONDA	MT
2020-07-14	406-638-6XXX	6000–6999	Assigned	TELEPORT COMMUNICATIONS AMERICA MT - LLC	771G	HARDIN	MT
2020-07-14	406-821-5XXX	5000–5999	Assigned	TELNYX LLC	073H	DARBY	MT
2020-07-14	406-845-0XXX	0000–0999	Assigned	TELNYX LLC	073H	CUT BANK	MT
2020-07-14	406-865-8XXX	8000–8999	Assigned	TELNYX LLC	073H	DILLON	MT
2020-07-14	406-909-1XXX	1000–1999	Assigned	TELNYX LLC	073H	COLUMBIFLS	MT
2020-07-13	406-298-2XXX	2000–2999	Assigned	BANDWIDTH.COM CLEC, LLC - MT	994E	COLUMBUS	MT
2020-07-13	406-602-2XXX	2000–2999	Assigned	BANDWIDTH.COM CLEC, LLC - MT	994E	BOZEMAN	MT
2020-07-13	406-602-3XXX	3000–3999	Assigned	BANDWIDTH.COM CLEC, LLC - MT	994E	BOZEMAN	MT
2020-07-13	406-602-5XXX	5000–5999	Assigned	BANDWIDTH.COM CLEC, LLC - MT	994E	BOZEMAN	MT
2020-07-08	406-341-1XXX	1000–1999	Assigned	ONVOY, LLC - MT	453F	MANHATTAN	MT
2020-07-08	406-341-2XXX	2000–2999	Assigned	ONVOY, LLC - MT	453F	MANHATTAN	MT
2020-07-02	406-300-9XXX	9000–9999	Assigned	METROPCS, INC.	5562	KALISPELL	MT
2020-06-30	406-916-6XXX	6000–6999	Assigned	T-MOBILE USA, INC.	6529	HELENA	MT
2020-06-26	406-321-8XXX	8000–8999	Assigned	AIRUS, INC. - MT	588H	COLUMBUS	MT
2020-06-26	406-790-9XXX	9000–9999	Assigned	NEW CINGULAR WIRELESS PCS, LLC	6010	CULBERTSON	MT
2020-06-18	406-416-4XXX	4000–4999	Assigned	ONVOY, LLC - MT	453F	FORSYTH	MT
2020-06-18	406-416-5XXX	5000–5999	Assigned	ONVOY, LLC - MT	453F	FORSYTH	MT
2020-06-15	406-283-9XXX	9000–9999	Assigned	TELEPORT COMMUNICATIONS AMERICA MT - LLC	771G	LIBBY	MT
2020-06-15	406-284-0XXX	0000–0999	Assigned	ONVOY, LLC - MT	453F	MANHATTAN	MT
2020-06-11	406-296-6XXX	6000–6999	Assigned	ONVOY, LLC - MT	453F	EUREKA	MT
2020-06-05	406-844-1XXX	1000–1999	Assigned	WESTERN MONTANA COMMUNITYTEL INC. - MT	986F	LAKESIDE	MT
2020-06-05	406-857-1XXX	1000–1999	Assigned	WESTERN MONTANA COMMUNITYTEL INC. - MT	986F	SOMERS	MT
2020-06-02	406-506-9XXX	9000–9999	Assigned	HD CARRIER LLC	321J	BILLINGS	MT
2020-05-26	406-312-2XXX	2000–2999	Assigned	NUSO, LLC	478J	BOZEMAN	MT
2020-05-07	406-229-4XXX	4000–4999	Assigned	ONVOY, LLC - MT	453F	CUT BANK	MT
2020-05-07	406-282-2XXX	2000–2999	Assigned	BANDWIDTH.COM CLEC, LLC - MT	994E	MANHATTAN	MT
2020-05-07	406-283-0XXX	0000–0999	Assigned	ONVOY, LLC - MT	453F	LIBBY	MT
2020-05-07	406-295-3XXX	3000–3999	Assigned	ONVOY, LLC - MT	453F	TROY	MT
2020-05-07	406-308-3XXX	3000–3999	Assigned	ONVOY, LLC - MT	453F	CASCADE	MT
2020-05-07	406-316-3XXX	3000–3999	Assigned	ONVOY, LLC - MT	453F	BOULDER	MT
2020-05-07	406-344-9XXX	9000–9999	Assigned	ONVOY, LLC - MT	453F	HAVRE	MT
2020-04-20	406-351-6XXX	6000–6999	Assigned	BANDWIDTH.COM CLEC, LLC - MT	994E	FORSYTH	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.