Home Postcode finder NSW Mitchells Flat Mitchells Flat postcode NSW Mitchells Flat 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 Mitchells Flat business listing Be the first listing in Mitchells Flat Common questionsWhat is the postcode for Mitchells Flat?Mitchells Flat, NSW has the postcode 2330.What state is Mitchells Flat in?Mitchells Flat 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 Mitchells Flat. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.