Home Postcodes by state VIC 3758 Postcode 3758 3758 is the postcode for 2 localities in VIC: Heathcote Junction and Wandong. Localities with postcode 3758Heathcote JunctionVICWandongVIC Postcode 3758 State or territory Victoria (VIC) Localities 2 Council area Mitchell Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 3757 · Postcode 3759