spencers-brook postcode wa Home ›› Postcode Finder ›› WA ›› Spencers-Brook Spencers Brook local listingsThe suburb of Spencers Brook is located in WA and has a postcode of 6401. Free spencers brook business listing! Get the first free listing in spencers brook! Search and find other Postcodes in Western Australia or widen the search to Postcodes in Australia.