South Dakota This is a complete list of our dial-up numbers in South Dakota. Keep in mind that the ultimate deciding factor in determining if a dial-up number is local call for you is your local calling plan. If you have any questions, please call your local telephone company. To narrow your search, please select an area code below. 605 Return to the Top Area Code 605 Location Access Number Belle Fourche (605) 892-0305 Canton (605) 987-3515 Elk Point (605) 356-6065 Flandreau (605) 997-5605 Huron (605) 353-7965 Lake Preston (605) 847-4025 Miller (605) 853-9225 Mitchell (605) 995-7945 Rapid City (605) 415-4003 Sioux Falls (605) 413-4009 Spearfish (605) 644-2605 Sturgis (605) 423-9865 Vermillion (605) 624-7705 Volga (605) 627-6355 Whitewood (605) 269-9305