Home Postcodes by state SA 5223 Postcode 5223 5223 is the postcode for 30 localities in SA: Bay Of Shoals, Birchmore, Brownlow Ki, Cape Borda, Cassini, Cygnet River and 24 more. Localities with postcode 5223Bay Of ShoalsSABirchmoreSABrownlow KiSACape BordaSACassiniSACygnet RiverSADe Mole RiverSAD'Estrees BaySADuncanSAEmu BaySAFlinders ChaseSAGosseSAHainesSAHarriet RiverSAKarattaSAKingscoteSAKohinoorSAMacgillivraySAMenziesSAMiddle RiverSANepean BaySANewlandSANorth CapeSASeal BaySASeddonSAStokes BaySAStun'Sail BoomSAVivonne BaySAWestern RiverSAWisangerSA Postcode 5223 State or territory South Australia (SA) Localities 30 Council area Kangaroo Island Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 5222 · Postcode 5231