Home Postcode finder SA Stewart Range Stewart Range postcode SA Stewart Range 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 Stewart Range business listing Be the first listing in Stewart Range Common questionsWhat is the postcode for Stewart Range?Stewart Range, SA has the postcode 5271.What state is Stewart Range in?Stewart Range 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 Stewart Range. Browse other postcodes in South Australia, or widen the search to every Australian postcode.