Reference Data Rate Center Directory SOUTHSHORE, SD Rate Center SOUTHSHORE — SD Data last updated: March 10, 2026 LATA 640 State SD Area Codes 1 Exchanges (NXX) 1 Carriers 1 Coordinates 45.10531056355065, -96.92797109912246 Area Codes 605 Top Carriers Carrier OCN NXX Count INTERSTATE TELECOM COOP, INC. - SD 1651 1
