Reference DataRate Center DirectoryCRYSTAL LK, IA Rate CenterCRYSTAL LK — IAData last updated: October 30, 2026LATA632StateIAArea Codes1Exchanges (NXX)1Carriers1Coordinates43.22236745528102, -93.79110214001498Area Codes641Top CarriersCarrierOCNNXX CountWINNEBAGO COOP. TEL. ASSN. - IA13371