Home Postcodes by state SA 5690 Postcode 5690 5690 is the postcode for 19 localities in SA: Bookabie, Ceduna, Charra, Coorabie, Denial Bay, Fowlers Bay and 13 more. Localities with postcode 5690BookabieSACedunaSACharraSACoorabieSADenial BaySAFowlers BaySAKalanbiSAKoonibbaSAMalteeSAMerghinySANadiaSANundrooSAPenongSAThevenardSAUworraSAWandanaSAWatrabaSAWhite Well CornerSAYalataSA Postcode 5690 State or territory South Australia (SA) Localities 19 Council area Ceduna; Unincorporated SA Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 5680 · Postcode 5700