Home Postcode finder WA Little Sandy Desert Little Sandy Desert postcode WA Little Sandy Desert is a locality in Western Australia covered by postcode 6646. Postcode 6646 State or territory Western Australia (WA) Region North West Suburbs Add a free Little Sandy Desert business listing Be the first listing in Little Sandy Desert Common questionsWhat is the postcode for Little Sandy Desert?Little Sandy Desert, WA has the postcode 6646.What state is Little Sandy Desert in?Little Sandy Desert is in Western Australia (WA).Does postcode 6646 cover more than one suburb?Yes. Postcode 6646 covers 3 localities, so the postcode alone does not identify Little Sandy Desert. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.