Home Postcode finder VIC Dunearn Dunearn postcode VIC Dunearn is a locality in Victoria covered by postcode 3175. Postcode 3175 State or territory Victoria (VIC) Region Dandenong Add a free Dunearn business listing Be the first listing in Dunearn Common questionsWhat is the postcode for Dunearn?Dunearn, VIC has the postcode 3175.What state is Dunearn in?Dunearn is in Victoria (VIC).Does postcode 3175 cover more than one suburb?Yes. Postcode 3175 covers 7 localities, so the postcode alone does not identify Dunearn. Browse other postcodes in Victoria, or widen the search to every Australian postcode.