Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 406 [Rate centres in NPA 406] [Dial plan for NPA 406]

NXX: 923

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
406-923 A Great Falls MT MSSLMTXC3MD  939H COMMIO, LLC 648      
406-923 3 Great Falls MT MSSLMTXC3MD  939H COMMIO, LLC 648      
406-923 8 Great Falls MT GRFLMTMAGMD  6529 T-MOBILE USA, INC. 648      
406-923 9 Great Falls MT GRFLMTMAGMD  6529 T-MOBILE USA, INC. 648      

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

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