Home Postcodes by state NSW 2155 Postcode 2155 2155 is the postcode for 4 localities in NSW: Beaumont Hills, Kellyville, Kellyville Ridge and Rouse Hill. Localities with postcode 2155Beaumont HillsNSWKellyvilleNSWKellyville RidgeNSWRouse HillNSW Postcode 2155 State or territory New South Wales (NSW) Localities 4 Council area The Hills; Blacktown; Mainly The Hills, partly Blacktown Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 2154 · Postcode 2156