Home Postcode finder WA North Wialki North Wialki postcode WA North Wialki is a locality in Western Australia covered by postcode 6473. Postcode 6473 State or territory Western Australia (WA) Region Wa Subs 1 G Flds Add a free North Wialki business listing Be the first listing in North Wialki Common questionsWhat is the postcode for North Wialki?North Wialki, WA has the postcode 6473.What state is North Wialki in?North Wialki is in Western Australia (WA).Does postcode 6473 cover more than one suburb?Yes. Postcode 6473 covers 2 localities, so the postcode alone does not identify North Wialki. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.