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: 863

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
406-863 A Whitefish MT WHFSMTXCRS0  2249 CENTURYTEL OF MONTANA, INC. DBA CENTURYLINK 648      
406-863 0 Whitefish MT WHFSMTXCRS0  2249 CENTURYTEL OF MONTANA, INC. DBA CENTURYLINK 648      
406-863 1 Whitefish MT WHFSMTXCRS0  2249 CENTURYTEL OF MONTANA, INC. DBA CENTURYLINK 648      
406-863 2 Whitefish MT WHFSMTXCRS0  2249 CENTURYTEL OF MONTANA, INC. DBA CENTURYLINK 648      
406-863 3 Whitefish MT WHFSMTXCRS0  2249 CENTURYTEL OF MONTANA, INC. DBA CENTURYLINK 648      
406-863 4 Whitefish MT WHFSMTXCRS0  2249 CENTURYTEL OF MONTANA, INC. DBA CENTURYLINK 648      
406-863 5 Whitefish MT MSSLMTMAYMD  771G TELEPORT COMMUNICATIONS AMERICA MT - LLC 648   2015-05-22   
406-863 6 Whitefish MT GRFLMTMA7MD  453F ONVOY, LLC - MT 648   2019-09-15   
406-863 7 Whitefish MT HLNAMTMAUMD  508J CENTURYLINK COMMUNICATIONS, LLC 648   2014-05-31   
406-863 8 Whitefish MT PLSNMTPC1MD  986F WESTERN MONTANA COMMUNITYTEL INC. - MT 648   2021-12-18   
406-863 9 Whitefish MT WHFSMTXCRS0  2249 CENTURYTEL OF MONTANA, INC. DBA CENTURYLINK 648      

Last updated: Sat, 02 May 2026 12:20:53 UTC

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