Reference Data Rate Center Directory WHITE LAKE, SD Rate Center WHITE LAKE — SD Data last updated: March 10, 2026 LATA 640 State SD Area Codes 1 Exchanges (NXX) 1 Carriers 1 Coordinates 43.73082437644813, -98.71288582222512 Area Codes 605 Top Carriers Carrier OCN NXX Count MIDSTATE COMMUNICATIONS, INC. 1670 1
