Home Postcode finder WA Wannamal Wannamal postcode WA Wannamal is a locality in Western Australia covered by postcode 6505. Postcode 6505 State or territory Western Australia (WA) Region Wa Subs 4 Coast Add a free Wannamal business listing Be the first listing in Wannamal Common questionsWhat is the postcode for Wannamal?Wannamal, WA has the postcode 6505.What state is Wannamal in?Wannamal is in Western Australia (WA).Does postcode 6505 cover more than one suburb?No. Postcode 6505 covers Wannamal only, which is unusual - most Australian postcodes cover several localities. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.