Home Postcode finder VIC Allans Flat Allans Flat postcode VIC Allans Flat is a locality in Victoria covered by postcode 3691. Postcode 3691 State or territory Victoria (VIC) Region Vic Far Country Add a free Allans Flat business listing Be the first listing in Allans Flat Common questionsWhat is the postcode for Allans Flat?Allans Flat, VIC has the postcode 3691.What state is Allans Flat in?Allans Flat is in Victoria (VIC).Does postcode 3691 cover more than one suburb?Yes. Postcode 3691 covers 34 localities, so the postcode alone does not identify Allans Flat. It also appears in 2 states or territories, so it does not identify a state either. Browse other postcodes in Victoria, or widen the search to every Australian postcode.