Home Postcode finder WA Kokeby Kokeby postcode WA Kokeby is a locality in Western Australia covered by postcode 6304. Postcode 6304 State or territory Western Australia (WA) Region Wa Subs 2 Gsr Add a free Kokeby business listing Be the first listing in Kokeby Common questionsWhat is the postcode for Kokeby?Kokeby, WA has the postcode 6304.What state is Kokeby in?Kokeby is in Western Australia (WA).Does postcode 6304 cover more than one suburb?Yes. Postcode 6304 covers 7 localities, so the postcode alone does not identify Kokeby. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.