Home Postcode finder WA Purnululu Purnululu postcode WA Purnululu is a locality in Western Australia covered by postcode 6770. Postcode 6770 State or territory Western Australia (WA) Region North West Suburbs Add a free Purnululu business listing Be the first listing in Purnululu Common questionsWhat is the postcode for Purnululu?Purnululu, WA has the postcode 6770.What state is Purnululu in?Purnululu is in Western Australia (WA).Does postcode 6770 cover more than one suburb?Yes. Postcode 6770 covers 7 localities, so the postcode alone does not identify Purnululu. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.