Home Postcode finder SA Wall Flat Wall Flat postcode SA Wall Flat is a locality in South Australia covered by postcode 5238. Postcode 5238 State or territory South Australia (SA) Region Sa Subs Near 2 Add a free Wall Flat business listing Be the first listing in Wall Flat Common questionsWhat is the postcode for Wall Flat?Wall Flat, SA has the postcode 5238.What state is Wall Flat in?Wall Flat is in South Australia (SA).Does postcode 5238 cover more than one suburb?Yes. Postcode 5238 covers 31 localities, so the postcode alone does not identify Wall Flat. Browse other postcodes in South Australia, or widen the search to every Australian postcode.