Reference Data Rate Center Directory IRENE, SD Rate Center IRENE — SD Data last updated: March 10, 2026 LATA 640 State SD Area Codes 1 Exchanges (NXX) 1 Carriers 1 Coordinates 43.08301963406839, -97.1597634141406 Area Codes 605 Top Carriers Carrier OCN NXX Count CLARITY TELECOM, LLC DBA BLUEPEAK 1652 1
