Home Postcode finder VIC Ryanston Ryanston postcode VIC Ryanston is a locality in Victoria covered by postcode 3992. Postcode 3992 State or territory Victoria (VIC) Region Vic Far Country Add a free Ryanston business listing Be the first listing in Ryanston Common questionsWhat is the postcode for Ryanston?Ryanston, VIC has the postcode 3992.What state is Ryanston in?Ryanston is in Victoria (VIC).Does postcode 3992 cover more than one suburb?Yes. Postcode 3992 covers 4 localities, so the postcode alone does not identify Ryanston. Browse other postcodes in Victoria, or widen the search to every Australian postcode.