Home Postcodes by state NSW 2774 Postcode 2774 2774 is the postcode for 4 localities in NSW: Blaxland, Blaxland East, Mount Riverview and Warrimoo. Localities with postcode 2774BlaxlandNSWBlaxland EastNSWMount RiverviewNSWWarrimooNSW Postcode 2774 State or territory New South Wales (NSW) Localities 4 Council area Blue Mountains Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 2773 · Postcode 2775