Area Code 406-682 located in ENNIS, MADISON, MT, more detail is as below. Place NPA (Numbering Plan Area) : 406 NXX (Local Number Prefix) : 682 City : ENNIS County : MADISON State : MT (Montana) NXX Use Type : Landline NXX Intro Version : 1994-02-04 FIPS (Federal Information Processing Standards) : 30057 LATA (Local Access Transport Area) : 648 Rate Center : ENNIS ZIP Code Count : 1503 ZIP Code Frequency : 75 ZIP Code : 59729 Other Information NPANXX : 406682 Switch CLLI (Common Language Location Identifier) : ENNSMTXCDS0 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 : ENNIS Latitude : 45.3478 Longitude : -111.7257 ‹ previous : 406-682 next › : 406-683 Telephone Number List 406-682-0000 ~ 406-682-9999