Home Postcode finder VIC Reservoir South Reservoir South postcode VIC Reservoir South is a locality in Victoria covered by postcode 3073. Postcode 3073 State or territory Victoria (VIC) Region Preston Add a free Reservoir South business listing Be the first listing in Reservoir South Common questionsWhat is the postcode for Reservoir South?Reservoir South, VIC has the postcode 3073.What state is Reservoir South in?Reservoir South is in Victoria (VIC).Does postcode 3073 cover more than one suburb?Yes. Postcode 3073 covers 5 localities, so the postcode alone does not identify Reservoir South. Browse other postcodes in Victoria, or widen the search to every Australian postcode.