Home Postcode finder WA Jane Brook Jane Brook postcode WA Jane Brook is a locality in Western Australia covered by postcode 6056. Postcode 6056 State or territory Western Australia (WA) Region North West Suburbs Add a free Jane Brook business listing More business listings in Jane Brook Businesses in Jane BrookAccess Technologies 27 DeGrey Retreat · (08) 6305 0511 Common questionsWhat is the postcode for Jane Brook?Jane Brook, WA has the postcode 6056.What state is Jane Brook in?Jane Brook is in Western Australia (WA).Does postcode 6056 cover more than one suburb?Yes. Postcode 6056 covers 17 localities, so the postcode alone does not identify Jane Brook. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.