Home Postcode finder NSW Nerong Nerong postcode NSW Nerong 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 Nerong business listing Be the first listing in Nerong Common questionsWhat is the postcode for Nerong?Nerong, NSW has the postcode 2423.What state is Nerong in?Nerong 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 Nerong. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.