Home Postcode finder VIC Mailors Flat Mailors Flat postcode VIC Mailors Flat is a locality in Victoria covered by postcode 3275. Postcode 3275 State or territory Victoria (VIC) Region Vic Far Country Add a free Mailors Flat business listing Be the first listing in Mailors Flat Common questionsWhat is the postcode for Mailors Flat?Mailors Flat, VIC has the postcode 3275.What state is Mailors Flat in?Mailors Flat is in Victoria (VIC).Does postcode 3275 cover more than one suburb?No. Postcode 3275 covers Mailors Flat only, which is unusual - most Australian postcodes cover several localities. Browse other postcodes in Victoria, or widen the search to every Australian postcode.