Home Postcode finder NSW Duns Creek Duns Creek postcode NSW Duns Creek is a locality in New South Wales covered by postcode 2321. Postcode 2321 State or territory New South Wales (NSW) Region Hunter Add a free Duns Creek business listing Be the first listing in Duns Creek Common questionsWhat is the postcode for Duns Creek?Duns Creek, NSW has the postcode 2321.What state is Duns Creek in?Duns Creek is in New South Wales (NSW).Does postcode 2321 cover more than one suburb?Yes. Postcode 2321 covers 20 localities, so the postcode alone does not identify Duns Creek. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.