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
2023-06-02	406-765-5XXX	5000–5999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - MT	9415	PLENTYWOOD	MT
2023-05-26	406-489-5XXX	5000–5999	Assigned	TERRA NOVA TELECOM INC.	145J	SIDNEY	MT
2023-05-26	406-749-3XXX	3000–3999	Assigned	TERRA NOVA TELECOM INC.	145J	COLSTRIP	MT
2023-05-26	406-853-7XXX	7000–7999	Assigned	TERRA NOVA TELECOM INC.	145J	MILES CITY	MT
2023-05-19	406-740-3XXX	3000–3999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT	6564	COLSTRIP	MT
2023-05-16	406-202-7XXX	7000–7999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT	6564	HELENA	MT
2023-05-15	406-613-6XXX	6000–6999	Assigned	BOOST SUBSCRIBERCO L.L.C.	490J	BOZEMAN	MT
2023-05-11	406-218-0XXX	0000–0999	Assigned	NEW CINGULAR WIRELESS PCS, LLC	6010	MISSOULA	MT
2023-05-09	406-623-1XXX	1000–1999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT	6564	HARDIN	MT
2023-05-04	406-597-8XXX	8000–8999	Assigned	ONVOY, LLC - MT	453F	SHELBY	MT
2023-04-27	406-516-9XXX	9000–9999	Assigned	BOOST SUBSCRIBERCO L.L.C.	490J	LAUREL	MT
2023-04-24	406-405-4XXX	4000–4999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - MT	9415	LIBBY	MT
2023-04-17	406-216-6XXX	6000–6999	Assigned	TELNYX LLC	073H	GREATFALLS	MT
2023-04-11	406-770-1XXX	1000–1999	Assigned	COMCAST IP PHONE, LLC	318J	GREATFALLS	MT
2023-04-05	406-503-1XXX	1000–1999	Assigned	COMCAST IP PHONE, LLC	318J	BILLINGS	MT
2023-03-29	406-796-7XXX	7000–7999	Assigned	TERRA NOVA TELECOM INC.	145J	WIBAUX	MT
2023-03-27	406-416-3XXX	3000–3999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT	6564	FORSYTH	MT
2023-03-09	406-445-8XXX	8000–8999	Assigned	TELEPORT COMMUNICATIONS AMERICA MT - LLC	771G	RED LODGE	MT
2023-03-08	406-384-1XXX	1000–1999	Assigned	NEW CINGULAR WIRELESS PCS, LLC	6010	BILLINGS	MT
2023-03-08	406-384-3XXX	3000–3999	Assigned	NEW CINGULAR WIRELESS PCS, LLC	6010	BILLINGS	MT
2023-03-08	406-384-9XXX	9000–9999	Assigned	NEW CINGULAR WIRELESS PCS, LLC	6010	BILLINGS	MT
2023-03-08	406-438-4XXX	4000–4999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - MT	9415	HELENA	MT
2023-03-08	406-601-2XXX	2000–2999	Assigned	NEW CINGULAR WIRELESS PCS, LLC	6010	BILLINGS	MT
2023-03-07	406-421-0XXX	0000–0999	Assigned	CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MT	6564	SOMILES CY	MT
2023-03-03	406-391-2XXX	2000–2999	Assigned	ONVOY, LLC - MT	453F	CUT BANK	MT
2023-03-03	406-512-2XXX	2000–2999	Assigned	ONVOY, LLC - MT	453F	BOULDER	MT
2023-03-01	406-878-2XXX	2000–2999	Assigned	NUSO, LLC	732J	GREATFALLS	MT
2023-02-22	406-512-1XXX	1000–1999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - MT	9415	BOULDER	MT
2023-02-22	406-942-1XXX	1000–1999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - MT	9415	GLASGOW	MT
2023-02-21	406-923-3XXX	3000–3999	Assigned	COMMIO, LLC	939H	GREATFALLS	MT
2023-02-17	406-507-1XXX	1000–1999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - MT	9415	WHITEFISH	MT
2023-02-15	406-308-8XXX	8000–8999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - MT	9415	CASCADE	MT
2023-02-15	406-888-1XXX	1000–1999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - MT	9415	W GLACIER	MT
2023-02-15	406-909-5XXX	5000–5999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - MT	9415	COLUMBIFLS	MT
2023-02-14	406-629-6XXX	6000–6999	Assigned	ONVOY, LLC - MT	453F	HARDIN	MT
2023-02-14	406-836-3XXX	3000–3999	Assigned	ONVOY, LLC - MT	453F	GREATFALLS	MT
2023-02-08	406-550-4XXX	4000–4999	Assigned	NUSO, LLC	732J	MISSOULA	MT
2023-02-06	406-574-4XXX	4000–4999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - MT	9415	SILVERTIP	MT
2023-02-06	406-659-8XXX	8000–8999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - MT	9415	NO PARKMAN	MT
2023-02-06	406-982-1XXX	1000–1999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - MT	9415	YELLOW BAY	MT
2023-02-03	406-226-3XXX	3000–3999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - MT	9415	EGLACIERPK	MT
2023-02-03	406-387-2XXX	2000–2999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - MT	9415	HUNGRYHORS	MT
2023-02-03	406-844-6XXX	6000–6999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - MT	9415	LAKESIDE	MT
2023-02-03	406-849-3XXX	3000–3999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - MT	9415	ELMO	MT
2023-02-03	406-854-3XXX	3000–3999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - MT	9415	MARION	MT
2023-02-03	406-881-1XXX	1000–1999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - MT	9415	OLNEY	MT
2023-02-03	406-887-5XXX	5000–5999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - MT	9415	FINLEY PT	MT
2023-02-03	406-957-3XXX	3000–3999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - MT	9415	TERRY	MT
2023-02-03	406-980-7XXX	7000–7999	Assigned	LEVEL 3 COMMUNICATIONS, LLC - MT	9415	TOWNSEND	MT
2023-01-30	406-215-0XXX	0000–0999	Assigned	CENTURYLINK COMMUNICATIONS, LLC	508J	MISSOULA	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.