Area Code 406-733 located in HIGHWOOD, CHOUTEAU, MT, more detail is as below. Place NPA (Numbering Plan Area) : 406 NXX (Local Number Prefix) : 733 City : HIGHWOOD County : CHOUTEAU State : MT (Montana) NXX Use Type : Landline NXX Intro Version : 1994-02-04 FIPS (Federal Information Processing Standards) : 30015 LATA (Local Access Transport Area) : 648 Rate Center : HIGHWOOD ZIP Code Count : 213 ZIP Code Frequency : 99 ZIP Code : 59450 Other Information NPANXX : 406733 Switch CLLI (Common Language Location Identifier) : HGWDMTXCRS1 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 : HIGHWOOD Latitude : 47.5876 Longitude : -110.7872 ‹ previous : 406-732 next › : 406-734 Telephone Number List 406-733-0000 ~ 406-733-9999