Home Postcode finder WA Mordalup Mordalup postcode WA Mordalup is a locality in Western Australia covered by postcode 6258. Postcode 6258 State or territory Western Australia (WA) Region Wa Subs 3 Sth Rd Add a free Mordalup business listing Be the first listing in Mordalup Common questionsWhat is the postcode for Mordalup?Mordalup, WA has the postcode 6258.What state is Mordalup in?Mordalup is in Western Australia (WA).Does postcode 6258 cover more than one suburb?Yes. Postcode 6258 covers 22 localities, so the postcode alone does not identify Mordalup. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.