Home Postcode finder VIC Dumbalk Dumbalk postcode VIC Dumbalk is a locality in Victoria covered by postcode 3956. Postcode 3956 State or territory Victoria (VIC) Region Vic Far Country Add a free Dumbalk business listing Be the first listing in Dumbalk Common questionsWhat is the postcode for Dumbalk?Dumbalk, VIC has the postcode 3956.What state is Dumbalk in?Dumbalk is in Victoria (VIC).Does postcode 3956 cover more than one suburb?Yes. Postcode 3956 covers 9 localities, so the postcode alone does not identify Dumbalk. Browse other postcodes in Victoria, or widen the search to every Australian postcode.