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: 730

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
406-730 A Whitefish MT KLSLMTAZ1MD  792K CHARTER IP ENABLED SERVICES, LLC 648      
406-730 0 Whitefish MT   073H TELNYX LLC 648   2020-08-13   
406-730 1 Whitefish MT   792K CHARTER IP ENABLED SERVICES, LLC 648   2008-05-05   
406-730 2 Whitefish MT   792K CHARTER IP ENABLED SERVICES, LLC 648   2006-04-21   
406-730 3 Whitefish MT   453F ONVOY, LLC - MT 648   2012-12-15   
406-730 4 Whitefish MT   453F ONVOY, LLC - MT 648   2012-12-15   
406-730 5 Whitefish MT   453F ONVOY, LLC - MT 648   2007-03-08   
406-730 6 Whitefish MT   453F ONVOY, LLC - MT 648   2012-12-15   
406-730 7 Whitefish MT   453F ONVOY, LLC - MT 648   2010-11-28   
406-730 8 Whitefish MT   792K CHARTER IP ENABLED SERVICES, LLC 648   2013-11-11   
406-730 9 Whitefish MT   453F ONVOY, LLC - MT 648   2021-03-28   

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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