Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

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 BLNGMTMAXMD  6529 T-MOBILE USA, INC. 650   2024-07-24   
406-993 1 BGSYMTXCDS0  2255 3 RIVERS TEL. COOP., INC. 650      
406-993 2 BGSYMTXCDS0  2255 3 RIVERS TEL. COOP., INC. 650      
406-993 3 BGSYMTXCDS0  2255 3 RIVERS TEL. COOP., INC. 650      
406-993 4 BGSYMTXCDS0  2255 3 RIVERS TEL. COOP., INC. 650      
406-993 5 BGSYMTXCDS0  2255 3 RIVERS TEL. COOP., INC. 650      
406-993 6 BGSYMTXCDS0  2255 3 RIVERS TEL. COOP., INC. 650      
406-993 7 BGSYMTXCDS0  2255 3 RIVERS TEL. COOP., INC. 650      
406-993 8 BLNGMTWE6MD  9415 LEVEL 3 COMMUNICATIONS, LLC - MT 650   2019-02-14   
406-993 9 BGSYMTXCDS0  2255 3 RIVERS TEL. COOP., INC. 650      
406-995 A BGSYMTXCDS0  2255 3 RIVERS TEL. COOP., INC. 650      
406-995 0 BGSYMTXCDS0  2255 3 RIVERS TEL. COOP., INC. 650   2023-12-16   
406-995 1 BGSYMTXCDS0  2255 3 RIVERS TEL. COOP., INC. 650      
406-995 2 BGSYMTXCDS0  2255 3 RIVERS TEL. COOP., INC. 650      
406-995 3 BGSYMTXCDS0  2255 3 RIVERS TEL. COOP., INC. 650      
406-995 4 BGSYMTXCDS0  2255 3 RIVERS TEL. COOP., INC. 650      
406-995 5 BGSYMTXCDS0  2255 3 RIVERS TEL. COOP., INC. 650      
406-995 6 BGSYMTXCDS0  2255 3 RIVERS TEL. COOP., INC. 650      
406-995 7 BGSYMTXCDS0  2255 3 RIVERS TEL. COOP., INC. 650      
406-995 8 BGSYMTXCDS0  2255 3 RIVERS TEL. COOP., INC. 650      
406-995 9 BGSYMTXCDS0  2255 3 RIVERS TEL. COOP., INC. 650      
406-999 A BZMNMTHZDS0  746D MONTANA OPTICOM, LLC - MT 650      

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.