Area Code 406-264 located in SUN RIVER, CASCADE, MT, more detail is as below. Place NPA (Numbering Plan Area) : 406 NXX (Local Number Prefix) : 264 City : SUN RIVER County : CASCADE State : MT (Montana) NXX Use Type : Landline NXX Intro Version : 1994-02-04 FIPS (Federal Information Processing Standards) : 30013 LATA (Local Access Transport Area) : 648 Rate Center : FORT SHAW ZIP Code Count : 202 ZIP Code Frequency : 31 ZIP Code : 59483 Other Information NPANXX : 406264 Switch CLLI (Common Language Location Identifier) : FTSHMTXARS1 MSA CBSA (Core Based Statistical Area) : Great Falls, MT MSA CBSA Code (Core Based Statistical Area) : 24500 Time Zone : Mountain (GMT -07:00) Observes Daylight Saving Time : Yes Company : 3 RIVERS TELEPHONE COOPERATIVE, INC. OCN (Operating Company Number) : 2255 Coverage Area Name : FORT SHAW Latitude : 47.5084 Longitude : -111.8149 ‹ previous : 406-263 next › : 406-264 Telephone Number List 406-264-0000 ~ 406-264-9999