Home Postcode finder TAS Quamby Brook Quamby Brook postcode TAS Quamby Brook is a locality in Tasmania covered by postcode 7304. Postcode 7304 State or territory Tasmania (TAS) Region Tasmania Add a free Quamby Brook business listing Be the first listing in Quamby Brook Common questionsWhat is the postcode for Quamby Brook?Quamby Brook, TAS has the postcode 7304.What state is Quamby Brook in?Quamby Brook is in Tasmania (TAS).Does postcode 7304 cover more than one suburb?Yes. Postcode 7304 covers 29 localities, so the postcode alone does not identify Quamby Brook. Browse other postcodes in Tasmania, or widen the search to every Australian postcode.