Home Postcode finder WA Kununoppin Kununoppin postcode WA Kununoppin is a locality in Western Australia covered by postcode 6489. Postcode 6489 State or territory Western Australia (WA) Region Wa Subs 1 G Flds Add a free Kununoppin business listing Be the first listing in Kununoppin Common questionsWhat is the postcode for Kununoppin?Kununoppin, WA has the postcode 6489.What state is Kununoppin in?Kununoppin is in Western Australia (WA).Does postcode 6489 cover more than one suburb?Yes. Postcode 6489 covers 3 localities, so the postcode alone does not identify Kununoppin. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.