Home Postcode finder SA Gulnare Gulnare postcode SA Gulnare is a locality in South Australia covered by postcode 5471. Postcode 5471 State or territory South Australia (SA) Region Sa Subs Near 1 Add a free Gulnare business listing Be the first listing in Gulnare Common questionsWhat is the postcode for Gulnare?Gulnare, SA has the postcode 5471.What state is Gulnare in?Gulnare is in South Australia (SA).Does postcode 5471 cover more than one suburb?No. Postcode 5471 covers Gulnare only, which is unusual - most Australian postcodes cover several localities. Browse other postcodes in South Australia, or widen the search to every Australian postcode.