Area Code 406-258 located in MISSOULA, MISSOULA, MT, more detail is as below. Place NPA (Numbering Plan Area) : 406 NXX (Local Number Prefix) : 258 City : MISSOULA County : MISSOULA State : MT (Montana) NXX Use Type : Landline NXX Intro Version : 1994-02-04 FIPS (Federal Information Processing Standards) : 30063 LATA (Local Access Transport Area) : 648 Rate Center : MISSOULA ZIP Code Count : 693 ZIP Code Frequency : 63 ZIP Code : 59802 Other Information NPANXX : 406258 Switch CLLI (Common Language Location Identifier) : MLTWMTMARS1 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 : QWEST CORPORATION OCN (Operating Company Number) : 9636 Coverage Area Name : MISSOULA Latitude : 46.8703 Longitude : -113.8712 ‹ previous : 406-258 next › : 406-259 Telephone Number List 406-258-0000 ~ 406-258-9999