Home Postcode finder WA Keysbrook Keysbrook postcode WA Keysbrook is a locality in Western Australia covered by postcode 6126. Postcode 6126 State or territory Western Australia (WA) Region North West Suburbs Add a free Keysbrook business listing Be the first listing in Keysbrook Common questionsWhat is the postcode for Keysbrook?Keysbrook, WA has the postcode 6126.What state is Keysbrook in?Keysbrook is in Western Australia (WA).Does postcode 6126 cover more than one suburb?No. Postcode 6126 covers Keysbrook only, which is unusual - most Australian postcodes cover several localities. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.