Area Code 605-520 located in WATERTOWN, CODINGTON, SD, more detail is as below. Place NPA (Numbering Plan Area) : 605 NXX (Local Number Prefix) : 520 City : WATERTOWN County : CODINGTON State : SD (South Dakota) NXX Use Type : Wireless NXX Intro Version : 1999-07-22 FIPS (Federal Information Processing Standards) : 46029 LATA (Local Access Transport Area) : 640 Rate Center : WATERTOWN ZIP Code Count : 1 ZIP Code Frequency : 50 ZIP Code : 57201 Other Information NPANXX : 605520 County Population : 0 Switch CLLI (Common Language Location Identifier) : WTTWSDARCM1 MSA CBSA (Core Based Statistical Area) : Watertown, SD MSA CBSA Code (Core Based Statistical Area) : 47980 Time Zone : Central (GMT -06:00) Observes Daylight Saving Time : Yes Company : NEW CINGULAR WIRELESS PCS, LLC - IL OCN (Operating Company Number) : 6534 Coverage Area Name : WATERTOWN Latitude : 44.8461 Longitude : -97.0064 ‹ previous : 605-520 next › : 605-521 Telephone Number List 605-520-0000 ~ 605-520-9999