Area Code 605-506 located in VERMILLION, CLAY, SD, more detail is as below. Place NPA (Numbering Plan Area) : 605 NXX (Local Number Prefix) : 506 City : VERMILLION County : CLAY State : SD (South Dakota) NXX Use Type : Landline NXX Intro Version : 2005-03-27 FIPS (Federal Information Processing Standards) : 46027 LATA (Local Access Transport Area) : 640 ZIP Code Count : 0 ZIP Code Frequency : Most frequently occurring ZIP Code, although percentage is unknown. ZIP Code : 57069 Other Information NPANXX : 605506 County Population : 0 MSA CBSA (Core Based Statistical Area) : Vermillion, SD MSA CBSA Code (Core Based Statistical Area) : 46820 Time Zone : Central (GMT -06:00) Observes Daylight Saving Time : Yes Coverage Area Name : VERMILLION Latitude : 42.7840 Longitude : -96.9317 ‹ previous : 605-505 next › : 605-509 Telephone Number List 605-506-0000 ~ 605-506-9999