Reference DataRate Center DirectoryANDOVER, MO Rate CenterANDOVER — MOData last updated: October 30, 2026LATA632StateMOArea Codes1Exchanges (NXX)1Carriers1Coordinates40.56526881508538, -93.8966545209639Area Codes660Top CarriersCarrierOCNNXX CountGRAND RIVER MUTUAL TEL CO18881