Home Postcode finder QLD Southbrook Southbrook postcode QLD Southbrook is a locality in Queensland covered by postcode 4363. Postcode 4363 State or territory Queensland (QLD) Region Toowoomba Region Add a free Southbrook business listing More business listings in Southbrook Businesses in SouthbrookSouthbrook Central State School1 School Rd · 07 46910142 Common questionsWhat is the postcode for Southbrook?Southbrook, QLD has the postcode 4363.What state is Southbrook in?Southbrook is in Queensland (QLD).Does postcode 4363 cover more than one suburb?No. Postcode 4363 covers Southbrook only, which is unusual - most Australian postcodes cover several localities. Browse other postcodes in Queensland, or widen the search to every Australian postcode.