Home Postcodes by state VIC 3815 Postcode 3815 3815 is the postcode for 4 localities in VIC: Bunyip, Bunyip North, Iona and Tonimbuk. Localities with postcode 3815BunyipVICBunyip NorthVICIonaVICTonimbukVIC Postcode 3815 State or territory Victoria (VIC) Localities 4 Council area Cardinia Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 3814 · Postcode 3816