Home Postcode finder WA Bulong Bulong postcode WA Bulong is a locality in Western Australia covered by postcode 6431. Postcode 6431 State or territory Western Australia (WA) Region Wa Subs 1 G Flds Add a free Bulong business listing Be the first listing in Bulong Common questionsWhat is the postcode for Bulong?Bulong, WA has the postcode 6431.What state is Bulong in?Bulong is in Western Australia (WA).Does postcode 6431 cover more than one suburb?Yes. Postcode 6431 covers 13 localities, so the postcode alone does not identify Bulong. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.