Home Postcode finder TAS Three Hummock Island Three Hummock Island postcode TAS Three Hummock Island is a locality in Tasmania covered by postcode 7330. Postcode 7330 State or territory Tasmania (TAS) Region Tasmania Add a free Three Hummock Island business listing Be the first listing in Three Hummock Island Common questionsWhat is the postcode for Three Hummock Island?Three Hummock Island, TAS has the postcode 7330.What state is Three Hummock Island in?Three Hummock Island is in Tasmania (TAS).Does postcode 7330 cover more than one suburb?Yes. Postcode 7330 covers 28 localities, so the postcode alone does not identify Three Hummock Island. Browse other postcodes in Tasmania, or widen the search to every Australian postcode.