Home Postcode finder SA Blewitt Springs Blewitt Springs postcode SA Blewitt Springs is a locality in South Australia covered by postcode 5171. Postcode 5171 State or territory South Australia (SA) Region Adelaide Add a free Blewitt Springs business listing Be the first listing in Blewitt Springs Common questionsWhat is the postcode for Blewitt Springs?Blewitt Springs, SA has the postcode 5171.What state is Blewitt Springs in?Blewitt Springs is in South Australia (SA).Does postcode 5171 cover more than one suburb?Yes. Postcode 5171 covers 5 localities, so the postcode alone does not identify Blewitt Springs. Browse other postcodes in South Australia, or widen the search to every Australian postcode.