Area Code 406-566 located in LEWISTOWN, FERGUS, MT, more detail is as below. Place NPA (Numbering Plan Area) : 406 NXX (Local Number Prefix) : 566 City : LEWISTOWN County : FERGUS State : MT (Montana) NXX Use Type : Landline NXX Intro Version : 1994-02-04 FIPS (Federal Information Processing Standards) : 30027 LATA (Local Access Transport Area) : 648 Rate Center : STANFORD ZIP Code Count : 45 ZIP Code Frequency : 11 ZIP Code : 59457 Other Information NPANXX : 406566 Switch CLLI (Common Language Location Identifier) : STFRMTXCRS1 Time Zone : Mountain (GMT -07:00) Observes Daylight Saving Time : Yes Company : CENTRAL MONTANA COMMUNICATIONS, INC. OCN (Operating Company Number) : 3310 Coverage Area Name : STANFORD Latitude : 47.1509 Longitude : -110.2156 ‹ previous : 406-565 next › : 406-566 Telephone Number List 406-566-0000 ~ 406-566-9999