Home Postcode finder WA Cardup Cardup postcode WA Cardup is a locality in Western Australia covered by postcode 6122. Postcode 6122 State or territory Western Australia (WA) Region North West Suburbs Add a free Cardup business listing Be the first listing in Cardup Common questionsWhat is the postcode for Cardup?Cardup, WA has the postcode 6122.What state is Cardup in?Cardup is in Western Australia (WA).Does postcode 6122 cover more than one suburb?Yes. Postcode 6122 covers 4 localities, so the postcode alone does not identify Cardup. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.