Home Postcodes by state VIC 3043 Postcode 3043 3043 is the postcode for 3 localities in VIC: Gladstone Park, Gowanbrae and Tullamarine. Localities with postcode 3043Gladstone ParkVICGowanbraeVICTullamarineVIC Postcode 3043 State or territory Victoria (VIC) Localities 3 Council area Hume; Merri-bek Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 3042 · Postcode 3044