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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Switch: GRFLMTMAGMD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
406-401 5 Great Falls MT 6529 T-MOBILE USA, INC. 648      
406-402 A Great Falls MT 6529 T-MOBILE USA, INC. 648      
406-402 0 Great Falls MT 6529 T-MOBILE USA, INC. 648      
406-402 2 Great Falls MT 6529 T-MOBILE USA, INC. 648      
406-402 3 Great Falls MT 5562 METROPCS, INC. 648      
406-402 4 Great Falls MT 6529 T-MOBILE USA, INC. 648      
406-402 5 Great Falls MT 6529 T-MOBILE USA, INC. 648      
406-402 6 Great Falls MT 6529 T-MOBILE USA, INC. 648      
406-402 7 Great Falls MT 6529 T-MOBILE USA, INC. 648      
406-402 8 Great Falls MT 6529 T-MOBILE USA, INC. 648      
406-402 9 Great Falls MT 6529 T-MOBILE USA, INC. 648      
406-760 8 Great Falls MT 6529 T-MOBILE USA, INC. 648      
406-866 8 Great Falls MT 6529 T-MOBILE USA, INC. 648      
406-923 8 Great Falls MT 6529 T-MOBILE USA, INC. 648      
406-923 9 Great Falls MT 6529 T-MOBILE USA, INC. 648      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

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