Home Postcode finder QLD Ducklo Ducklo postcode QLD Ducklo is a locality in Queensland covered by postcode 4405. Postcode 4405 State or territory Queensland (QLD) Region Toowoomba Region Add a free Ducklo business listing Be the first listing in Ducklo Common questionsWhat is the postcode for Ducklo?Ducklo, QLD has the postcode 4405.What state is Ducklo in?Ducklo is in Queensland (QLD).Does postcode 4405 cover more than one suburb?Yes. Postcode 4405 covers 11 localities, so the postcode alone does not identify Ducklo. Browse other postcodes in Queensland, or widen the search to every Australian postcode.