Home Postcode finder NSW Coasters Retreat Coasters Retreat postcode NSW Coasters Retreat is a locality in New South Wales covered by postcode 2108. Postcode 2108 State or territory New South Wales (NSW) Region Frenchs Forest Add a free Coasters Retreat business listing Be the first listing in Coasters Retreat Common questionsWhat is the postcode for Coasters Retreat?Coasters Retreat, NSW has the postcode 2108.What state is Coasters Retreat in?Coasters Retreat is in New South Wales (NSW).Does postcode 2108 cover more than one suburb?Yes. Postcode 2108 covers 3 localities, so the postcode alone does not identify Coasters Retreat. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.