Home Postcodes by state VIC 3335 Postcode 3335 3335 is the postcode for 2 localities in VIC: Plumpton and Rockbank. Localities with postcode 3335PlumptonVICRockbankVIC Postcode 3335 State or territory Victoria (VIC) Localities 2 Council area Melton Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 3334 · Postcode 3337