Home Postcodes by state VIC 3180 Postcode 3180 3180 is the postcode for Knoxfield, VIC. Localities with postcode 3180KnoxfieldVIC Postcode 3180 State or territory Victoria (VIC) Localities 1 Council area Knox Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 3179 · Postcode 3181