Home Postcode finder NSW Big Ridge Big Ridge postcode NSW Big Ridge is a locality in New South Wales covered by postcode 2330. Postcode 2330 State or territory New South Wales (NSW) Region Hunter Add a free Big Ridge business listing Be the first listing in Big Ridge Common questionsWhat is the postcode for Big Ridge?Big Ridge, NSW has the postcode 2330.What state is Big Ridge in?Big Ridge is in New South Wales (NSW).Does postcode 2330 cover more than one suburb?Yes. Postcode 2330 covers 63 localities, so the postcode alone does not identify Big Ridge. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.