Home Postcode finder WA Dartnall Dartnall postcode WA Dartnall is a locality in Western Australia covered by postcode 6320. Postcode 6320 State or territory Western Australia (WA) Region Wa Subs 2 Gsr Add a free Dartnall business listing Be the first listing in Dartnall Common questionsWhat is the postcode for Dartnall?Dartnall, WA has the postcode 6320.What state is Dartnall in?Dartnall is in Western Australia (WA).Does postcode 6320 cover more than one suburb?Yes. Postcode 6320 covers 7 localities, so the postcode alone does not identify Dartnall. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.