Area Code 406-200 located in BILLINGS, YELLOWSTONE, MT, more detail is as below. Place NPA (Numbering Plan Area) : 406 NXX (Local Number Prefix) : 200 City : BILLINGS County : YELLOWSTONE State : MT (Montana) NXX Use Type : Landline NXX Intro Version : 3/18/2011 FIPS (Federal Information Processing Standards) : 30111 LATA (Local Access Transport Area) : 650 Rate Center : GALATNGTWY ZIP Code Count : 0 ZIP Code Frequency : 0 ZIP Code : 59106 Other Information NPANXX : 406200 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 : TC SYSTEMS, INC. - MT OCN (Operating Company Number) : 771G Coverage Area Name : BILLINGS Latitude : 45.7678 Longitude : -108.5930 ‹ previous : 405-999 next › : 406-201 Telephone Number List 406-200-0000 ~ 406-200-9999