Area Code 406-206 located in BILLINGS, YELLOWSTONE, MT, more detail is as below. Place NPA (Numbering Plan Area) : 406 NXX (Local Number Prefix) : 206 City : BILLINGS County : YELLOWSTONE State : MT (Montana) NXX Use Type : Landline NXX Intro Version : 2001-06-30 FIPS (Federal Information Processing Standards) : 30111 LATA (Local Access Transport Area) : 650 Rate Center : BILLINGS ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 59106 Other Information NPANXX : 406206 Switch CLLI (Common Language Location Identifier) : BLNGMTWE6MD 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 : LEVEL 3 COMMUNICATIONS, LLC - MT OCN (Operating Company Number) : 9415 Coverage Area Name : BILLINGS Latitude : 45.7723 Longitude : -108.5914 ‹ previous : 406-206 next › : 406-207 Telephone Number List 406-206-0000 ~ 406-206-9999