Home Postcodes by state NSW 2420 Postcode 2420 2420 is the postcode for 23 localities in NSW: Alison, Bandon Grove, Bendolba, Brookfield, Cambra, Chichester and 17 more. Localities with postcode 2420AlisonNSWBandon GroveNSWBendolbaNSWBrookfieldNSWCambraNSWChichesterNSWDungogNSWFlat TopsNSWFostertonNSWHanleys CreekNSWHilldaleNSWMain CreekNSWMarshdaleNSWMartins CreekNSWMunniNSWSalisburyNSWStroud HillNSWSugarloafNSWTabbil CreekNSWUnderbankNSWWallaringaNSWWallarobbaNSWWirragullaNSW Postcode 2420 State or territory New South Wales (NSW) Localities 23 Council area Dungog Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 2415 · Postcode 2421