Home Postcode finder NSW Coreen Coreen postcode NSW Coreen is a locality in New South Wales covered by postcode 2646. Postcode 2646 State or territory New South Wales (NSW) Region Canberra Add a free Coreen business listing Be the first listing in Coreen Common questionsWhat is the postcode for Coreen?Coreen, NSW has the postcode 2646.What state is Coreen in?Coreen is in New South Wales (NSW).Does postcode 2646 cover more than one suburb?Yes. Postcode 2646 covers 15 localities, so the postcode alone does not identify Coreen. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.