Home Postcodes by state NSW 2786 Postcode 2786 2786 is the postcode for 5 localities in NSW: Bell, Dargan, Mount Irvine, Mount Victoria and Mount Wilson. Localities with postcode 2786BellNSWDarganNSWMount IrvineNSWMount VictoriaNSWMount WilsonNSW Postcode 2786 State or territory New South Wales (NSW) Localities 5 Council area Blue Mountains; Lithgow Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 2785 · Postcode 2787