Home Postcode finder QLD Drillham South Drillham South postcode QLD Drillham South is a locality in Queensland covered by postcode 4424. Postcode 4424 State or territory Queensland (QLD) Region Toowoomba Region Add a free Drillham South business listing Be the first listing in Drillham South Common questionsWhat is the postcode for Drillham South?Drillham South, QLD has the postcode 4424.What state is Drillham South in?Drillham South is in Queensland (QLD).Does postcode 4424 cover more than one suburb?Yes. Postcode 4424 covers 3 localities, so the postcode alone does not identify Drillham South. Browse other postcodes in Queensland, or widen the search to every Australian postcode.