Home Postcode finder QLD Eukey Eukey postcode QLD Eukey is a locality in Queensland covered by postcode 4380. Postcode 4380 State or territory Queensland (QLD) Region Toowoomba Region Add a free Eukey business listing Be the first listing in Eukey Common questionsWhat is the postcode for Eukey?Eukey, QLD has the postcode 4380.What state is Eukey in?Eukey is in Queensland (QLD).Does postcode 4380 cover more than one suburb?Yes. Postcode 4380 covers 19 localities, so the postcode alone does not identify Eukey. It also appears in 2 states or territories, so it does not identify a state either. Browse other postcodes in Queensland, or widen the search to every Australian postcode.