Home Postcode finder NSWDL Adamstown Heights Adamstown Heights postcode NSWDL Adamstown Heights is a locality in New South Wales covered by postcode 2289. Postcode 2289 State or territory New South Wales (NSWDL) Region Hunter Add a free Adamstown Heights business listing More business listings in Adamstown Heights Businesses in Adamstown HeightsKU Bel Air Preschool38 Corriston Crescent · 02 4943 1616 Common questionsWhat is the postcode for Adamstown Heights?Adamstown Heights, NSWDL has the postcode 2289.What state is Adamstown Heights in?Adamstown Heights is in New South Wales (NSWDL).Does postcode 2289 cover more than one suburb?Yes. Postcode 2289 covers 7 localities, so the postcode alone does not identify Adamstown Heights. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.