Home Postcodes by state QLD 4018 Postcode 4018 4018 is the postcode for 2 localities in QLD: Fitzgibbon and Taigum. Localities with postcode 4018FitzgibbonQLDTaigumQLD Postcode 4018 State or territory Queensland (QLD) Localities 2 Council area Brisbane Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 4017 · Postcode 4019