Home Postcode finder TAS Murdunna Murdunna postcode TAS Murdunna is a locality in Tasmania covered by postcode 7178. Postcode 7178 State or territory Tasmania (TAS) Region Tasmania Add a free Murdunna business listing Be the first listing in Murdunna Common questionsWhat is the postcode for Murdunna?Murdunna, TAS has the postcode 7178.What state is Murdunna in?Murdunna is in Tasmania (TAS).Does postcode 7178 cover more than one suburb?No. Postcode 7178 covers Murdunna only, which is unusual - most Australian postcodes cover several localities. Browse other postcodes in Tasmania, or widen the search to every Australian postcode.