Home Postcodes by state VIC 3597 Postcode 3597 3597 is the postcode for 6 localities in VIC: Kenley, Kooloonong, Lake Powell, Narrung, Natya and Piangil. Localities with postcode 3597KenleyVICKooloonongVICLake PowellVICNarrungVICNatyaVICPiangilVIC Postcode 3597 State or territory Victoria (VIC) Localities 6 Council area Swan Hill Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 3596 · Postcode 3599