Home Postcode finder TAS Lewisham Lewisham postcode TAS Lewisham is a locality in Tasmania covered by postcode 7173. Postcode 7173 State or territory Tasmania (TAS) Region Tasmania Add a free Lewisham business listing Be the first listing in Lewisham Common questionsWhat is the postcode for Lewisham?Lewisham, TAS has the postcode 7173.What state is Lewisham in?Lewisham is in Tasmania (TAS).Does postcode 7173 cover more than one suburb?Yes. Postcode 7173 covers 7 localities, so the postcode alone does not identify Lewisham. Browse other postcodes in Tasmania, or widen the search to every Australian postcode.