Area Code 406-681 located in DILLON, BEAVERHEAD, MT, more detail is as below. Place NPA (Numbering Plan Area) : 406 NXX (Local Number Prefix) : 681 City : DILLON County : BEAVERHEAD State : MT (Montana) NXX Use Type : Landline NXX Intro Version : 1994-02-04 FIPS (Federal Information Processing Standards) : 30001 LATA (Local Access Transport Area) : 648 Rate Center : GRANT ZIP Code Count : 104 ZIP Code Frequency : 96 ZIP Code : 59725 Other Information NPANXX : 406681 Switch CLLI (Common Language Location Identifier) : GRNTMTXCRS1 Time Zone : Mountain (GMT -07:00) Observes Daylight Saving Time : Yes Company : SOUTHERN MONTANA TELEPHONE CO. OCN (Operating Company Number) : 2254 Coverage Area Name : POLARIS Latitude : 45.0025 Longitude : -113.1874 ‹ previous : 406-681 next › : 406-682 Telephone Number List 406-681-0000 ~ 406-681-9999