Home Postcode finder NSW Rainbow Flat Rainbow Flat postcode NSW Rainbow Flat is a locality in New South Wales covered by postcode 2430. Postcode 2430 State or territory New South Wales (NSW) Region Hunter Add a free Rainbow Flat business listing Be the first listing in Rainbow Flat Common questionsWhat is the postcode for Rainbow Flat?Rainbow Flat, NSW has the postcode 2430.What state is Rainbow Flat in?Rainbow Flat is in New South Wales (NSW).Does postcode 2430 cover more than one suburb?Yes. Postcode 2430 covers 39 localities, so the postcode alone does not identify Rainbow Flat. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.