Home Postcode finder SA Trihi Trihi postcode SA Trihi is a locality in South Australia covered by postcode 5279. Postcode 5279 State or territory South Australia (SA) Region SA Outer Suburbs Add a free Trihi business listing Be the first listing in Trihi Common questionsWhat is the postcode for Trihi?Trihi, SA has the postcode 5279.What state is Trihi in?Trihi is in South Australia (SA).Does postcode 5279 cover more than one suburb?Yes. Postcode 5279 covers 6 localities, so the postcode alone does not identify Trihi. Browse other postcodes in South Australia, or widen the search to every Australian postcode.