Home Postcode finder VIC Main Ridge Main Ridge postcode VIC Main Ridge is a locality in Victoria covered by postcode 3928. Postcode 3928 State or territory Victoria (VIC) Region Frankston Add a free Main Ridge business listing Be the first listing in Main Ridge Common questionsWhat is the postcode for Main Ridge?Main Ridge, VIC has the postcode 3928.What state is Main Ridge in?Main Ridge is in Victoria (VIC).Does postcode 3928 cover more than one suburb?No. Postcode 3928 covers Main Ridge only, which is unusual - most Australian postcodes cover several localities. Browse other postcodes in Victoria, or widen the search to every Australian postcode.