Home Postcode finder TAS Gunns Plains Gunns Plains postcode TAS Gunns Plains is a locality in Tasmania covered by postcode 7315. Postcode 7315 State or territory Tasmania (TAS) Region Tasmania Add a free Gunns Plains business listing Be the first listing in Gunns Plains Common questionsWhat is the postcode for Gunns Plains?Gunns Plains, TAS has the postcode 7315.What state is Gunns Plains in?Gunns Plains 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 Gunns Plains. Browse other postcodes in Tasmania, or widen the search to every Australian postcode.