Home Postcode finder WA Nullaki Nullaki postcode WA Nullaki is a locality in Western Australia covered by postcode 6330. Postcode 6330 State or territory Western Australia (WA) Region Wa Subs 2 Gsr Add a free Nullaki business listing Be the first listing in Nullaki Common questionsWhat is the postcode for Nullaki?Nullaki, WA has the postcode 6330.What state is Nullaki in?Nullaki is in Western Australia (WA).Does postcode 6330 cover more than one suburb?Yes. Postcode 6330 covers 50 localities, so the postcode alone does not identify Nullaki. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.