koolanooka postcode wa Home ›› Postcode Finder ›› WA ›› Koolanooka Koolanooka local listingsThe suburb of Koolanooka is located in WA and has a postcode of 6623. Free koolanooka business listing! Get the first free listing in koolanooka! Search and find other Postcodes in Western Australia or widen the search to Postcodes in Australia.