Home Postcode finder NSW Cundle Flat Cundle Flat postcode NSW Cundle Flat is a locality in New South Wales covered by postcode 2424. Postcode 2424 State or territory New South Wales (NSW) Region Hunter Add a free Cundle Flat business listing Be the first listing in Cundle Flat Common questionsWhat is the postcode for Cundle Flat?Cundle Flat, NSW has the postcode 2424.What state is Cundle Flat in?Cundle Flat is in New South Wales (NSW).Does postcode 2424 cover more than one suburb?Yes. Postcode 2424 covers 9 localities, so the postcode alone does not identify Cundle Flat. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.