Home Postcode finder NSW Mount Seaview Mount Seaview postcode NSW Mount Seaview is a locality in New South Wales covered by postcode 2446. Postcode 2446 State or territory New South Wales (NSW) Region NSW North Coast Add a free Mount Seaview business listing Be the first listing in Mount Seaview Common questionsWhat is the postcode for Mount Seaview?Mount Seaview, NSW has the postcode 2446.What state is Mount Seaview in?Mount Seaview is in New South Wales (NSW).Does postcode 2446 cover more than one suburb?Yes. Postcode 2446 covers 41 localities, so the postcode alone does not identify Mount Seaview. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.