Home Postcodes by state NSW 2749 Postcode 2749 2749 is the postcode for 2 localities in NSW: Castlereagh and Cranebrook. Localities with postcode 2749CastlereaghNSWCranebrookNSW Postcode 2749 State or territory New South Wales (NSW) Localities 2 Council area Penrith Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 2748 · Postcode 2750