Home Postcode finder SA Tranmere North Tranmere North postcode SA Tranmere North is a locality in South Australia covered by postcode 5073. Postcode 5073 State or territory South Australia (SA) Region Sa Subs Near 2 Add a free Tranmere North business listing Be the first listing in Tranmere North Common questionsWhat is the postcode for Tranmere North?Tranmere North, SA has the postcode 5073.What state is Tranmere North in?Tranmere North is in South Australia (SA).Does postcode 5073 cover more than one suburb?Yes. Postcode 5073 covers 4 localities, so the postcode alone does not identify Tranmere North. Browse other postcodes in South Australia, or widen the search to every Australian postcode.