Area Code 406-254 located in BILLINGS, YELLOWSTONE, MT, more detail is as below. Place NPA (Numbering Plan Area) : 406 NXX (Local Number Prefix) : 254 City : BILLINGS County : YELLOWSTONE State : MT (Montana) NXX Use Type : Landline NXX Intro Version : 1994-02-04 FIPS (Federal Information Processing Standards) : 30111 LATA (Local Access Transport Area) : 650 Rate Center : BILLINGS ZIP Code Count : 389 ZIP Code Frequency : 18 ZIP Code : 59102 Other Information NPANXX : 406254 Switch CLLI (Common Language Location Identifier) : BLNGMTMADS1 MSA CBSA (Core Based Statistical Area) : Billings, MT MSA CBSA Code (Core Based Statistical Area) : 13740 Time Zone : Mountain (GMT -07:00) Observes Daylight Saving Time : Yes Company : QWEST CORPORATION OCN (Operating Company Number) : 9636 Coverage Area Name : BILLINGS Latitude : 45.7819 Longitude : -108.5058 ‹ previous : 406-254 next › : 406-254 Telephone Number List 406-254-0000 ~ 406-254-9999