Home Postcode finder QLD Mosquito Creek Mosquito Creek postcode QLD Mosquito Creek is a locality in Queensland covered by postcode 4387. Postcode 4387 State or territory Queensland (QLD) Region Toowoomba Region Add a free Mosquito Creek business listing Be the first listing in Mosquito Creek Common questionsWhat is the postcode for Mosquito Creek?Mosquito Creek, QLD has the postcode 4387.What state is Mosquito Creek in?Mosquito Creek is in Queensland (QLD).Does postcode 4387 cover more than one suburb?Yes. Postcode 4387 covers 9 localities, so the postcode alone does not identify Mosquito Creek. Browse other postcodes in Queensland, or widen the search to every Australian postcode.