Home Postcodes by state NSW 2143 Postcode 2143 2143 is the postcode for 3 localities in NSW: Birrong, Potts Hill and Regents Park. Localities with postcode 2143BirrongNSWPotts HillNSWRegents ParkNSW Postcode 2143 State or territory New South Wales (NSW) Localities 3 Council area Canterbury-Bankstown; Mainly Cumberland, partly Canterbury-Bankstown Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 2142 · Postcode 2144