Home Postcode finder NSW Warranulla Warranulla postcode NSW Warranulla is a locality in New South Wales covered by postcode 2423. Postcode 2423 State or territory New South Wales (NSW) Region Hunter Add a free Warranulla business listing Be the first listing in Warranulla Common questionsWhat is the postcode for Warranulla?Warranulla, NSW has the postcode 2423.What state is Warranulla in?Warranulla is in New South Wales (NSW).Does postcode 2423 cover more than one suburb?Yes. Postcode 2423 covers 20 localities, so the postcode alone does not identify Warranulla. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.