Home Postcode finder QLD Byee Byee postcode QLD Byee is a locality in Queensland covered by postcode 4605. Postcode 4605 State or territory Queensland (QLD) Region Toowoomba Region Add a free Byee business listing Be the first listing in Byee Common questionsWhat is the postcode for Byee?Byee, QLD has the postcode 4605.What state is Byee in?Byee is in Queensland (QLD).Does postcode 4605 cover more than one suburb?Yes. Postcode 4605 covers 21 localities, so the postcode alone does not identify Byee. Browse other postcodes in Queensland, or widen the search to every Australian postcode.