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.
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Plains, MT

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
406-826 A PLNSMTXCRS1  2235 BLACKFOOT TEL. COOP., INC. 648      
406-826 0 PLNSMTXCRS1  2235 BLACKFOOT TEL. COOP., INC. 648      
406-826 1 CHRLMT010MD  986F WESTERN MONTANA COMMUNITYTEL INC. - MT 648   2013-08-25   
406-826 2 PLNSMTXCRS1  2235 BLACKFOOT TEL. COOP., INC. 648      
406-826 3 PLNSMTXCRS1  2235 BLACKFOOT TEL. COOP., INC. 648      
406-826 4 PLNSMTXCRS1  2235 BLACKFOOT TEL. COOP., INC. 648      
406-826 5 PLNSMTXCRS1  2235 BLACKFOOT TEL. COOP., INC. 648      
406-826 6 PLNSMTXCRS1  2235 BLACKFOOT TEL. COOP., INC. 648      
406-826 8 MSSLMTMA0MD  9415 LEVEL 3 COMMUNICATIONS, LLC - MT 648   2016-06-27   
406-826 9 PLNSMTXCRS1  2235 BLACKFOOT TEL. COOP., INC. 648      

Last updated: Wed, 18 Jun 2025 02:30:00 UTC

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