Home Postcode finder WA Coomalbidgup Coomalbidgup postcode WA Coomalbidgup is a locality in Western Australia covered by postcode 6450. Postcode 6450 State or territory Western Australia (WA) Region Wa Subs 1 G Flds Add a free Coomalbidgup business listing Be the first listing in Coomalbidgup Common questionsWhat is the postcode for Coomalbidgup?Coomalbidgup, WA has the postcode 6450.What state is Coomalbidgup in?Coomalbidgup is in Western Australia (WA).Does postcode 6450 cover more than one suburb?Yes. Postcode 6450 covers 23 localities, so the postcode alone does not identify Coomalbidgup. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.