Home Postcodes by state VIC 3640 Postcode 3640 3640 is the postcode for Katunga, VIC. Localities with postcode 3640KatungaVIC Postcode 3640 State or territory Victoria (VIC) Localities 1 Council area Moira Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 3639 · Postcode 3641