Home Postcodes by state QLD 4558 Postcode 4558 4558 is the postcode for 4 localities in QLD: Cotton Tree, Kuluin, Maroochydore and Sunshine Plaza. Localities with postcode 4558Cotton TreeQLDKuluinQLDMaroochydoreQLDSunshine PlazaQLD Postcode 4558 State or territory Queensland (QLD) Localities 4 Council area Sunshine Coast Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 4557 · Postcode 4559