Home Postcode finder VIC Coronet Bay Coronet Bay postcode VIC Coronet Bay is a locality in Victoria covered by postcode 3984. Postcode 3984 State or territory Victoria (VIC) Region Vic Far Country Add a free Coronet Bay business listing Be the first listing in Coronet Bay Common questionsWhat is the postcode for Coronet Bay?Coronet Bay, VIC has the postcode 3984.What state is Coronet Bay in?Coronet Bay is in Victoria (VIC).Does postcode 3984 cover more than one suburb?Yes. Postcode 3984 covers 13 localities, so the postcode alone does not identify Coronet Bay. Browse other postcodes in Victoria, or widen the search to every Australian postcode.