Home Postcode finder SA Pages Flat Pages Flat postcode SA Pages Flat is a locality in South Australia covered by postcode 5172. Postcode 5172 State or territory South Australia (SA) Region Adelaide Add a free Pages Flat business listing Be the first listing in Pages Flat Common questionsWhat is the postcode for Pages Flat?Pages Flat, SA has the postcode 5172.What state is Pages Flat in?Pages Flat is in South Australia (SA).Does postcode 5172 cover more than one suburb?Yes. Postcode 5172 covers 13 localities, so the postcode alone does not identify Pages Flat. Browse other postcodes in South Australia, or widen the search to every Australian postcode.