Home Postcode finder VIC Dunach Dunach postcode VIC Dunach is a locality in Victoria covered by postcode 3371. Postcode 3371 State or territory Victoria (VIC) Region Vic Far Country Add a free Dunach business listing Be the first listing in Dunach Common questionsWhat is the postcode for Dunach?Dunach, VIC has the postcode 3371.What state is Dunach in?Dunach is in Victoria (VIC).Does postcode 3371 cover more than one suburb?Yes. Postcode 3371 covers 10 localities, so the postcode alone does not identify Dunach. Browse other postcodes in Victoria, or widen the search to every Australian postcode.