Home Postcode finder SA Keppoch Keppoch postcode SA Keppoch is a locality in South Australia covered by postcode 5271. Postcode 5271 State or territory South Australia (SA) Region SA Outer Suburbs Add a free Keppoch business listing Be the first listing in Keppoch Common questionsWhat is the postcode for Keppoch?Keppoch, SA has the postcode 5271.What state is Keppoch in?Keppoch is in South Australia (SA).Does postcode 5271 cover more than one suburb?Yes. Postcode 5271 covers 18 localities, so the postcode alone does not identify Keppoch. Browse other postcodes in South Australia, or widen the search to every Australian postcode.