Home Postcodes by state QLD 4006 Postcode 4006 4006 is the postcode for 4 localities in QLD: Bowen Hills, Fortitude Valley, Herston and Newstead. Localities with postcode 4006Bowen HillsQLDFortitude ValleyQLDHerstonQLDNewsteadQLD Postcode 4006 State or territory Queensland (QLD) Localities 4 Council area Brisbane Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 4005 · Postcode 4007