Home Postcode finder QLD Upper Flagstone Upper Flagstone postcode QLD Upper Flagstone is a locality in Queensland covered by postcode 4344. Postcode 4344 State or territory Queensland (QLD) Region Western Suburbs Add a free Upper Flagstone business listing Be the first listing in Upper Flagstone Common questionsWhat is the postcode for Upper Flagstone?Upper Flagstone, QLD has the postcode 4344.What state is Upper Flagstone in?Upper Flagstone is in Queensland (QLD).Does postcode 4344 cover more than one suburb?Yes. Postcode 4344 covers 12 localities, so the postcode alone does not identify Upper Flagstone. Browse other postcodes in Queensland, or widen the search to every Australian postcode.