Home Postcode finder TAS Castra Castra postcode TAS Castra is a locality in Tasmania covered by postcode 7315. Postcode 7315 State or territory Tasmania (TAS) Region Tasmania Add a free Castra business listing Be the first listing in Castra Common questionsWhat is the postcode for Castra?Castra, TAS has the postcode 7315.What state is Castra in?Castra is in Tasmania (TAS).Does postcode 7315 cover more than one suburb?Yes. Postcode 7315 covers 17 localities, so the postcode alone does not identify Castra. Browse other postcodes in Tasmania, or widen the search to every Australian postcode.