Home Postcode finder QLD Gwambegwine Gwambegwine postcode QLD Gwambegwine is a locality in Queensland covered by postcode 4420. Postcode 4420 State or territory Queensland (QLD) Region Toowoomba Region Add a free Gwambegwine business listing Be the first listing in Gwambegwine Common questionsWhat is the postcode for Gwambegwine?Gwambegwine, QLD has the postcode 4420.What state is Gwambegwine in?Gwambegwine is in Queensland (QLD).Does postcode 4420 cover more than one suburb?Yes. Postcode 4420 covers 8 localities, so the postcode alone does not identify Gwambegwine. Browse other postcodes in Queensland, or widen the search to every Australian postcode.