Home Postcode finder QLD Greenbank Greenbank postcode QLD Greenbank is a locality in Queensland covered by postcode 4124. Postcode 4124 State or territory Queensland (QLD) Region Heathwood Add a free Greenbank business listing More business listings in Greenbank Businesses in Greenbank Safe Dig Vacuum Excavation21-29 Nuffield Rd. · 0408 880 262Black & White Pest ControlMiddle Rd · 0732000288Dynamic Earth SolutionsAndrew Rd, Greenbank QLD 4124, Australia · 0431 116 784 Common questionsWhat is the postcode for Greenbank?Greenbank, QLD has the postcode 4124.What state is Greenbank in?Greenbank is in Queensland (QLD).Does postcode 4124 cover more than one suburb?Yes. Postcode 4124 covers 5 localities, so the postcode alone does not identify Greenbank. Browse other postcodes in Queensland, or widen the search to every Australian postcode.