Area Code 605-298 located in ANDOVER, DAY, SD, more detail is as below. Place NPA (Numbering Plan Area) : 605 NXX (Local Number Prefix) : 298 City : ANDOVER County : DAY State : SD (South Dakota) NXX Use Type : Landline NXX Intro Version : 1994-02-04 FIPS (Federal Information Processing Standards) : 46037 LATA (Local Access Transport Area) : 640 Rate Center : ANDOVER ZIP Code Count : 106 ZIP Code Frequency : 99 ZIP Code : 57422 Other Information NPANXX : 605298 County Population : 0 Switch CLLI (Common Language Location Identifier) : ANDVSDXA298 Time Zone : Central (GMT -06:00) Observes Daylight Saving Time : Yes Company : JAMES VALLEY COOPERATIVE TELEPHONE COMPANY OCN (Operating Company Number) : 1664 Coverage Area Name : ANDOVER Latitude : 45.4079 Longitude : -97.9060 ‹ previous : 605-297 next › : 605-299 Telephone Number List 605-298-0000 ~ 605-298-9999