Home Postcode finder WA Dudinin Dudinin postcode WA Dudinin is a locality in Western Australia covered by postcode 6363. Postcode 6363 State or territory Western Australia (WA) Region Wa Subs 2 Gsr Add a free Dudinin business listing Be the first listing in Dudinin Common questionsWhat is the postcode for Dudinin?Dudinin, WA has the postcode 6363.What state is Dudinin in?Dudinin is in Western Australia (WA).Does postcode 6363 cover more than one suburb?Yes. Postcode 6363 covers 2 localities, so the postcode alone does not identify Dudinin. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.