Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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Big Sky, MT

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
406-993 A BGSYMTXCDS0  2255 3 RIVERS TEL. COOP., INC. 650      
406-993 0   6529 T-MOBILE USA, INC. 650   2024-07-24   
406-993 1   2255 3 RIVERS TEL. COOP., INC. 650      
406-993 2   2255 3 RIVERS TEL. COOP., INC. 650      
406-993 3   2255 3 RIVERS TEL. COOP., INC. 650      
406-993 4   2255 3 RIVERS TEL. COOP., INC. 650      
406-993 5   2255 3 RIVERS TEL. COOP., INC. 650      
406-993 6   2255 3 RIVERS TEL. COOP., INC. 650      
406-993 7   2255 3 RIVERS TEL. COOP., INC. 650      
406-993 8   9415 LEVEL 3 COMMUNICATIONS, LLC - MT 650   2019-02-14   
406-993 9   2255 3 RIVERS TEL. COOP., INC. 650      
406-995 A BGSYMTXCDS0  2255 3 RIVERS TEL. COOP., INC. 650      
406-995 0   2255 3 RIVERS TEL. COOP., INC. 650   2023-12-16   
406-995 1   2255 3 RIVERS TEL. COOP., INC. 650      
406-995 2   2255 3 RIVERS TEL. COOP., INC. 650      
406-995 3   2255 3 RIVERS TEL. COOP., INC. 650      
406-995 4   2255 3 RIVERS TEL. COOP., INC. 650      
406-995 5   2255 3 RIVERS TEL. COOP., INC. 650      
406-995 6   2255 3 RIVERS TEL. COOP., INC. 650      
406-995 7   2255 3 RIVERS TEL. COOP., INC. 650      
406-995 8   2255 3 RIVERS TEL. COOP., INC. 650      
406-995 9   2255 3 RIVERS TEL. COOP., INC. 650      
406-999 A BZMNMTHZDS0  746D MONTANA OPTICOM, LLC - MT 650      

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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