Home Postcode finder WA Cookernup Cookernup postcode WA Cookernup is a locality in Western Australia covered by postcode 6220. Postcode 6220 State or territory Western Australia (WA) Region Wa Subs 3 Sth Rd Add a free Cookernup business listing Be the first listing in Cookernup Common questionsWhat is the postcode for Cookernup?Cookernup, WA has the postcode 6220.What state is Cookernup in?Cookernup is in Western Australia (WA).Does postcode 6220 cover more than one suburb?Yes. Postcode 6220 covers 6 localities, so the postcode alone does not identify Cookernup. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.