Home Postcode finder WA Cuballing Cuballing postcode WA Cuballing is a locality in Western Australia covered by postcode 6311. Postcode 6311 State or territory Western Australia (WA) Region Wa Subs 2 Gsr Add a free Cuballing business listing Be the first listing in Cuballing Common questionsWhat is the postcode for Cuballing?Cuballing, WA has the postcode 6311.What state is Cuballing in?Cuballing is in Western Australia (WA).Does postcode 6311 cover more than one suburb?Yes. Postcode 6311 covers 8 localities, so the postcode alone does not identify Cuballing. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.