Home Postcode finder SA North Cape North Cape postcode SA North Cape is a locality in South Australia covered by postcode 5223. Postcode 5223 State or territory South Australia (SA) Region Sa Subs Near 2 Add a free North Cape business listing Be the first listing in North Cape Common questionsWhat is the postcode for North Cape?North Cape, SA has the postcode 5223.What state is North Cape in?North Cape is in South Australia (SA).Does postcode 5223 cover more than one suburb?Yes. Postcode 5223 covers 30 localities, so the postcode alone does not identify North Cape. Browse other postcodes in South Australia, or widen the search to every Australian postcode.