Home Postcode finder NSW Knorrit Flat Knorrit Flat postcode NSW Knorrit 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 Knorrit Flat business listing Be the first listing in Knorrit Flat Common questionsWhat is the postcode for Knorrit Flat?Knorrit Flat, NSW has the postcode 2424.What state is Knorrit Flat in?Knorrit 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 Knorrit Flat. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.