Home Postcode finder QLD Carstairs Carstairs postcode QLD Carstairs is a locality in Queensland covered by postcode 4806. Postcode 4806 State or territory Queensland (QLD) Region North QLD Add a free Carstairs business listing Be the first listing in Carstairs Common questionsWhat is the postcode for Carstairs?Carstairs, QLD has the postcode 4806.What state is Carstairs in?Carstairs is in Queensland (QLD).Does postcode 4806 cover more than one suburb?Yes. Postcode 4806 covers 9 localities, so the postcode alone does not identify Carstairs. Browse other postcodes in Queensland, or widen the search to every Australian postcode.