Home Postcode finder VIC North Blackwood North Blackwood postcode VIC North Blackwood is a locality in Victoria covered by postcode 3458. Postcode 3458 State or territory Victoria (VIC) Region Vic Far Country Add a free North Blackwood business listing Be the first listing in North Blackwood Common questionsWhat is the postcode for North Blackwood?North Blackwood, VIC has the postcode 3458.What state is North Blackwood in?North Blackwood is in Victoria (VIC).Does postcode 3458 cover more than one suburb?Yes. Postcode 3458 covers 9 localities, so the postcode alone does not identify North Blackwood. Browse other postcodes in Victoria, or widen the search to every Australian postcode.