Home Postcode finder VIC Arnold Arnold postcode VIC Arnold is a locality in Victoria covered by postcode 3551. Postcode 3551 State or territory Victoria (VIC) Region Vic Country Add a free Arnold business listing Be the first listing in Arnold Common questionsWhat is the postcode for Arnold?Arnold, VIC has the postcode 3551.What state is Arnold in?Arnold is in Victoria (VIC).Does postcode 3551 cover more than one suburb?Yes. Postcode 3551 covers 37 localities, so the postcode alone does not identify Arnold. Browse other postcodes in Victoria, or widen the search to every Australian postcode.