Reference Data Rate Center Directory ONIDA, SD Rate Center ONIDA — SD Data last updated: March 10, 2026 LATA 640 State SD Area Codes 1 Exchanges (NXX) 3 Carriers 1 Coordinates 44.70750877339322, -100.0623307408905 Area Codes 605 Top Carriers Carrier OCN NXX Count VENTURE COMMUNICATIONS COOPERATIVE 1680 3
