Home Postcode finder WA East Newdegate East Newdegate postcode WA East Newdegate is a locality in Western Australia covered by postcode 6355. Postcode 6355 State or territory Western Australia (WA) Region Wa Subs 2 Gsr Add a free East Newdegate business listing Be the first listing in East Newdegate Common questionsWhat is the postcode for East Newdegate?East Newdegate, WA has the postcode 6355.What state is East Newdegate in?East Newdegate is in Western Australia (WA).Does postcode 6355 cover more than one suburb?Yes. Postcode 6355 covers 11 localities, so the postcode alone does not identify East Newdegate. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.