Area Code 605-260 located in YANKTON, YANKTON, SD, more detail is as below. Place NPA (Numbering Plan Area) : 605 NXX (Local Number Prefix) : 260 City : YANKTON County : YANKTON State : SD (South Dakota) NXX Use Type : Landline NXX Intro Version : 1999-07-22 FIPS (Federal Information Processing Standards) : 46135 LATA (Local Access Transport Area) : 640 Rate Center : YANKTON ZIP Code Count : 729 ZIP Code Frequency : 100 ZIP Code : 57078 Other Information NPANXX : 605260 County Population : 0 Switch CLLI (Common Language Location Identifier) : YNTNSDBJDS0 MSA CBSA (Core Based Statistical Area) : Yankton, SD MSA CBSA Code (Core Based Statistical Area) : 49460 Time Zone : Central (GMT -06:00) Observes Daylight Saving Time : Yes Company : KNOLOGY OF THE PLAINS, INC. - SD OCN (Operating Company Number) : 7024 Coverage Area Name : YANKTON Latitude : 42.8755 Longitude : -97.3931 ‹ previous : 605-259 next › : 605-261 Telephone Number List 605-260-0000 ~ 605-260-9999