Home Postcode finder VIC Arnold West Arnold West postcode VIC Arnold West is a locality in Victoria covered by postcode 3551. Postcode 3551 State or territory Victoria (VIC) Region Vic Country Add a free Arnold West business listing Be the first listing in Arnold West Common questionsWhat is the postcode for Arnold West?Arnold West, VIC has the postcode 3551.What state is Arnold West in?Arnold West 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 West. Browse other postcodes in Victoria, or widen the search to every Australian postcode.