Home Postcode finder QLD Billa Billa Billa Billa postcode QLD Billa Billa is a locality in Queensland covered by postcode 4390. Postcode 4390 State or territory Queensland (QLD) Region Toowoomba Region Add a free Billa Billa business listing Be the first listing in Billa Billa Common questionsWhat is the postcode for Billa Billa?Billa Billa, QLD has the postcode 4390.What state is Billa Billa in?Billa Billa is in Queensland (QLD).Does postcode 4390 cover more than one suburb?Yes. Postcode 4390 covers 10 localities, so the postcode alone does not identify Billa Billa. Browse other postcodes in Queensland, or widen the search to every Australian postcode.