Home Postcodes by state NSW 2833 Postcode 2833 2833 is the postcode for Collarenebri, NSW. Localities with postcode 2833CollarenebriNSW Postcode 2833 State or territory New South Wales (NSW) Localities 1 Council area Walgett Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 2832 · Postcode 2834