Reference DataRate Center DirectorySOUTH LADD, SD Rate CenterSOUTH LADD — SDData last updated: October 30, 2026LATA638StateSDArea Codes1Exchanges (NXX)1Carriers1Coordinates45.93316561342604, -103.4439280780796Area Codes605Top CarriersCarrierOCNNXX CountCONSOLIDATED TELCOM16071