Home Postcode finder WA Bambun Bambun postcode WA Bambun is a locality in Western Australia covered by postcode 6503. Postcode 6503 State or territory Western Australia (WA) Region Wa Subs 4 Coast Add a free Bambun business listing Be the first listing in Bambun Common questionsWhat is the postcode for Bambun?Bambun, WA has the postcode 6503.What state is Bambun in?Bambun is in Western Australia (WA).Does postcode 6503 cover more than one suburb?Yes. Postcode 6503 covers 20 localities, so the postcode alone does not identify Bambun. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.