Home Postcode finder NSW Twelve Mile Peg Twelve Mile Peg postcode NSW Twelve Mile Peg is a locality in New South Wales covered by postcode 2540. Postcode 2540 State or territory New South Wales (NSW) Region NSW Country West Add a free Twelve Mile Peg business listing Be the first listing in Twelve Mile Peg Common questionsWhat is the postcode for Twelve Mile Peg?Twelve Mile Peg, NSW has the postcode 2540.What state is Twelve Mile Peg in?Twelve Mile Peg is in New South Wales (NSW).Does postcode 2540 cover more than one suburb?Yes. Postcode 2540 covers 68 localities, so the postcode alone does not identify Twelve Mile Peg. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.