Home Postcode finder QLD Undullah Undullah postcode QLD Undullah is a locality in Queensland covered by postcode 4285. Postcode 4285 State or territory Queensland (QLD) Region Heathwood Add a free Undullah business listing Be the first listing in Undullah Common questionsWhat is the postcode for Undullah?Undullah, QLD has the postcode 4285.What state is Undullah in?Undullah is in Queensland (QLD).Does postcode 4285 cover more than one suburb?Yes. Postcode 4285 covers 33 localities, so the postcode alone does not identify Undullah. Browse other postcodes in Queensland, or widen the search to every Australian postcode.