Home Postcode finder WA Mocardy Mocardy postcode WA Mocardy is a locality in Western Australia covered by postcode 6603. Postcode 6603 State or territory Western Australia (WA) Region Wa Subs 4 Coast Add a free Mocardy business listing Be the first listing in Mocardy Common questionsWhat is the postcode for Mocardy?Mocardy, WA has the postcode 6603.What state is Mocardy in?Mocardy is in Western Australia (WA).Does postcode 6603 cover more than one suburb?Yes. Postcode 6603 covers 5 localities, so the postcode alone does not identify Mocardy. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.