Home Postcode finder NSW Byrock Byrock postcode NSW Byrock is a locality in New South Wales covered by postcode 2831. Postcode 2831 State or territory New South Wales (NSW) Region NSW Country West Add a free Byrock business listing Be the first listing in Byrock Common questionsWhat is the postcode for Byrock?Byrock, NSW has the postcode 2831.What state is Byrock in?Byrock is in New South Wales (NSW).Does postcode 2831 cover more than one suburb?Yes. Postcode 2831 covers 23 localities, so the postcode alone does not identify Byrock. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.