Home Postcode finder NSW Browns Mountain Browns Mountain postcode NSW Browns Mountain 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 Browns Mountain business listing Be the first listing in Browns Mountain Common questionsWhat is the postcode for Browns Mountain?Browns Mountain, NSW has the postcode 2540.What state is Browns Mountain in?Browns Mountain 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 Browns Mountain. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.