Home Postcode finder VIC Greythorn Greythorn postcode VIC Greythorn is a locality in Victoria covered by postcode 3104. Postcode 3104 State or territory Victoria (VIC) Region Hawthorn Add a free Greythorn business listing More business listings in Greythorn Businesses in GreythornSt Bridget's School36 Sweyn St · 03 98576394 Common questionsWhat is the postcode for Greythorn?Greythorn, VIC has the postcode 3104.What state is Greythorn in?Greythorn is in Victoria (VIC).Does postcode 3104 cover more than one suburb?Yes. Postcode 3104 covers 2 localities, so the postcode alone does not identify Greythorn. Browse other postcodes in Victoria, or widen the search to every Australian postcode.