Home Postcode finder NSW Callaghans Creek Callaghans Creek postcode NSW Callaghans Creek is a locality in New South Wales covered by postcode 2422. Postcode 2422 State or territory New South Wales (NSW) Region Hunter Add a free Callaghans Creek business listing Be the first listing in Callaghans Creek Common questionsWhat is the postcode for Callaghans Creek?Callaghans Creek, NSW has the postcode 2422.What state is Callaghans Creek in?Callaghans Creek is in New South Wales (NSW).Does postcode 2422 cover more than one suburb?Yes. Postcode 2422 covers 45 localities, so the postcode alone does not identify Callaghans Creek. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.