Area Code 406-276 located in DILLON, BEAVERHEAD, MT, more detail is as below. Place NPA (Numbering Plan Area) : 406 NXX (Local Number Prefix) : 276 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 : LIMA ZIP Code Count : 21 ZIP Code Frequency : 6 ZIP Code : 59725 Other Information NPANXX : 406276 Switch CLLI (Common Language Location Identifier) : LIMAMTXCRS1 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 : LIMA Latitude : 44.6367 Longitude : -112.5903 ‹ previous : 406-276 next › : 406-276 Telephone Number List 406-276-0000 ~ 406-276-9999