Area Code 406-965 located in GREAT FALLS, CASCADE, MT, more detail is as below. Place NPA (Numbering Plan Area) : 406 NXX (Local Number Prefix) : 965 City : GREAT FALLS 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 : GREATFALLS ZIP Code Count : 392 ZIP Code Frequency : 61 ZIP Code : 59404 Other Information NPANXX : 406965 Switch CLLI (Common Language Location Identifier) : VGHNMTMARS1 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 : QWEST CORPORATION OCN (Operating Company Number) : 9636 Coverage Area Name : VAUGHN Latitude : 47.5631 Longitude : -111.5427 ‹ previous : 406-965 next › : 406-966 Telephone Number List 406-965-0000 ~ 406-965-9999