Home Postcode finder NSW Wallaringa Wallaringa postcode NSW Wallaringa is a locality in New South Wales covered by postcode 2420. Postcode 2420 State or territory New South Wales (NSW) Region Hunter Add a free Wallaringa business listing Be the first listing in Wallaringa Common questionsWhat is the postcode for Wallaringa?Wallaringa, NSW has the postcode 2420.What state is Wallaringa in?Wallaringa is in New South Wales (NSW).Does postcode 2420 cover more than one suburb?Yes. Postcode 2420 covers 23 localities, so the postcode alone does not identify Wallaringa. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.