Home Postcodes by state NSW 2752 Postcode 2752 2752 is the postcode for 2 localities in NSW: Silverdale and Warragamba. Localities with postcode 2752SilverdaleNSWWarragambaNSW Postcode 2752 State or territory New South Wales (NSW) Localities 2 Council area Wollondilly Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 2750 · Postcode 2753