Home Postcode finder SA Old Teal Flat Old Teal Flat postcode SA Old Teal 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 Old Teal Flat business listing Be the first listing in Old Teal Flat Common questionsWhat is the postcode for Old Teal Flat?Old Teal Flat, SA has the postcode 5238.What state is Old Teal Flat in?Old Teal 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 Old Teal Flat. Browse other postcodes in South Australia, or widen the search to every Australian postcode.