Area Code 406-540 located in MISSOULA, MISSOULA, MT, more detail is as below. Place NPA (Numbering Plan Area) : 406 NXX (Local Number Prefix) : 540 City : MISSOULA County : MISSOULA State : MT (Montana) NXX Use Type : Landline NXX Intro Version : 1999-07-22 FIPS (Federal Information Processing Standards) : 30063 LATA (Local Access Transport Area) : 648 Rate Center : MISSOULA ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 59802 Other Information NPANXX : 406540 Switch CLLI (Common Language Location Identifier) : MSSLMT132MD 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 : 360NETWORKS (USA) INC. - MT OCN (Operating Company Number) : 607D Coverage Area Name : MISSOULA Latitude : 46.8681 Longitude : -114.0008 ‹ previous : 406-540 next › : 406-541 Telephone Number List 406-540-0000 ~ 406-540-9999