Home Postcode finder NSW Piambong Piambong postcode NSW Piambong is a locality in New South Wales covered by postcode 2850. Postcode 2850 State or territory New South Wales (NSW) Region NSW Country West Add a free Piambong business listing Be the first listing in Piambong Common questionsWhat is the postcode for Piambong?Piambong, NSW has the postcode 2850.What state is Piambong in?Piambong is in New South Wales (NSW).Does postcode 2850 cover more than one suburb?Yes. Postcode 2850 covers 77 localities, so the postcode alone does not identify Piambong. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.