Home Postcodes by state VIC 3704 Postcode 3704 3704 is the postcode for Koetong, VIC. Localities with postcode 3704KoetongVIC Postcode 3704 State or territory Victoria (VIC) Localities 1 Council area Towong Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 3701 · Postcode 3705