Home Postcode finder NSW Quandary Quandary postcode NSW Quandary is a locality in New South Wales covered by postcode 2665. Postcode 2665 State or territory New South Wales (NSW) Region Canberra Add a free Quandary business listing Be the first listing in Quandary Common questionsWhat is the postcode for Quandary?Quandary, NSW has the postcode 2665.What state is Quandary in?Quandary is in New South Wales (NSW).Does postcode 2665 cover more than one suburb?Yes. Postcode 2665 covers 12 localities, so the postcode alone does not identify Quandary. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.