Home Postcodes by state NSW 2827 Postcode 2827 2827 is the postcode for 7 localities in NSW: Bearbong, Biddon, Breelong, Collie, Curban, Gilgandra and 1 more. Localities with postcode 2827BearbongNSWBiddonNSWBreelongNSWCollieNSWCurbanNSWGilgandraNSWMerrigalNSW Postcode 2827 State or territory New South Wales (NSW) Localities 7 Council area Gilgandra; Mainly Warren, partly Gilgandra; Warren Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 2825 · Postcode 2828