cosmo-newbery postcode wa Home ›› Postcode Finder ›› WA ›› Cosmo-Newbery Cosmo Newbery local listingsThe suburb of Cosmo Newbery is located in WA and has a postcode of 6440. Free cosmo newbery business listing! Get the first free listing in cosmo newbery! Search and find other Postcodes in Western Australia or widen the search to Postcodes in Australia.