Home Postcode finder QLD Cardstone Cardstone postcode QLD Cardstone is a locality in Queensland covered by postcode 4854. Postcode 4854 State or territory Queensland (QLD) Region North QLD Add a free Cardstone business listing Be the first listing in Cardstone Common questionsWhat is the postcode for Cardstone?Cardstone, QLD has the postcode 4854.What state is Cardstone in?Cardstone is in Queensland (QLD).Does postcode 4854 cover more than one suburb?Yes. Postcode 4854 covers 25 localities, so the postcode alone does not identify Cardstone. Browse other postcodes in Queensland, or widen the search to every Australian postcode.