Area Code 406-303 located in MISSOULA, MISSOULA, MT, more detail is as below. Place NPA (Numbering Plan Area) : 406 NXX (Local Number Prefix) : 303 City : MISSOULA County : MISSOULA State : MT (Montana) NXX Use Type : Landline NXX Intro Version : 4/17/2012 FIPS (Federal Information Processing Standards) : 30063 LATA (Local Access Transport Area) : 648 Rate Center : MISSOULA ZIP Code Count : 0 ZIP Code Frequency : 0 ZIP Code : 59801 Other Information NPANXX : 406303 MSA CBSA (Core Based Statistical Area) : Missoula, MT MSA CBSA Code (Core Based Statistical Area) : 33540 Time Zone : Mountain (GMT -07:00) Observes Daylight Saving Time : Yes Company : TC SYSTEMS, INC. - MT OCN (Operating Company Number) : 771G Coverage Area Name : MISSOULA Latitude : 46.8709 Longitude : -113.9865 ‹ previous : 406-302 next › : 406-305 Telephone Number List 406-303-0000 ~ 406-303-9999