Home Postcode finder QLD Tanby Tanby postcode QLD Tanby is a locality in Queensland covered by postcode 4703. Postcode 4703 State or territory Queensland (QLD) Region Central QLD Add a free Tanby business listing Be the first listing in Tanby Common questionsWhat is the postcode for Tanby?Tanby, QLD has the postcode 4703.What state is Tanby in?Tanby is in Queensland (QLD).Does postcode 4703 cover more than one suburb?Yes. Postcode 4703 covers 30 localities, so the postcode alone does not identify Tanby. Browse other postcodes in Queensland, or widen the search to every Australian postcode.