Home Postcode finder NSW Lostock Lostock postcode NSW Lostock is a locality in New South Wales covered by postcode 2311. Postcode 2311 State or territory New South Wales (NSW) Region Hunter Add a free Lostock business listing Be the first listing in Lostock Common questionsWhat is the postcode for Lostock?Lostock, NSW has the postcode 2311.What state is Lostock in?Lostock is in New South Wales (NSW).Does postcode 2311 cover more than one suburb?Yes. Postcode 2311 covers 11 localities, so the postcode alone does not identify Lostock. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.