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