Reference Data Rate Center Directory DELMONT, SD Rate Center DELMONT — SD Data last updated: March 10, 2026 LATA 640 State SD Area Codes 1 Exchanges (NXX) 1 Carriers 1 Coordinates 43.26737418284521, -98.16279949259166 Area Codes 605 Top Carriers Carrier OCN NXX Count MIDSTATE COMMUNICATIONS, INC. 1670 1
