Home Postcode finder NSW Neilrex Neilrex postcode NSW Neilrex 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 Neilrex business listing Be the first listing in Neilrex Common questionsWhat is the postcode for Neilrex?Neilrex, NSW has the postcode 2831.What state is Neilrex in?Neilrex 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 Neilrex. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.