Area Code 320-669 located in GRANITE FALLS, YELLOW MEDICINE, MN, more detail is as below. Place NPA (Numbering Plan Area) : 320 NXX (Local Number Prefix) : 669 City : GRANITE FALLS County : YELLOW MEDICINE State : MN (Minnesota) NXX Use Type : Landline NXX Intro Version : 1996-04-15 FIPS (Federal Information Processing Standards) : 27173 LATA (Local Access Transport Area) : 626 Rate Center : CLARKFIELD ZIP Code Count : 37 ZIP Code Frequency : 5 ZIP Code : 56241 Other Information NPANXX : 320669 County Population : 0 Switch CLLI (Common Language Location Identifier) : CLFDMNXCRS0 Time Zone : Central (GMT -06:00) Observes Daylight Saving Time : Yes Company : CITIZENS TELECOM CO MN-FRONTIER CITIZENS COM-MN OCN (Operating Company Number) : 1123 Coverage Area Name : CLARKFIELD Latitude : 44.7916 Longitude : -95.8049 ‹ previous : 320-668 next › : 320-669 Telephone Number List 320-669-0000 ~ 320-669-9999