Area Code 406-991 located in MARION, FLATHEAD, MT, more detail is as below. Place NPA (Numbering Plan Area) : 406 NXX (Local Number Prefix) : 991 City : MARION County : FLATHEAD State : MT (Montana) NXX Use Type : Landline NXX Intro Version : 10/11/2007 FIPS (Federal Information Processing Standards) : 30029 LATA (Local Access Transport Area) : 648 Rate Center : MARION ZIP Code Count : 0 ZIP Code Frequency : 0 ZIP Code : 59925 Other Information NPANXX : 406991 MSA CBSA (Core Based Statistical Area) : Kalispell, MT MSA CBSA Code (Core Based Statistical Area) : 28060 Time Zone : Mountain (GMT -07:00) Observes Daylight Saving Time : Yes Company : 360NETWORKS (USA) INC. - MT OCN (Operating Company Number) : 607D Coverage Area Name : MARION Latitude : 48.1010 Longitude : -114.6661 ‹ previous : 406-989 next › : 406-992 Telephone Number List 406-991-0000 ~ 406-991-9999