Home Postcode finder NSWDL Steam Plains Steam Plains postcode NSWDL Steam Plains is a locality in New South Wales covered by postcode 2710. Postcode 2710 State or territory New South Wales (NSWDL) Region Canberra Add a free Steam Plains business listing Be the first listing in Steam Plains Common questionsWhat is the postcode for Steam Plains?Steam Plains, NSWDL has the postcode 2710.What state is Steam Plains in?Steam Plains is in New South Wales (NSWDL).Does postcode 2710 cover more than one suburb?Yes. Postcode 2710 covers 23 localities, so the postcode alone does not identify Steam Plains. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.