boulder postcode wa Home ›› Postcode Finder ›› WA ›› Boulder Boulder local listingsThe suburb of Boulder is located in WA and has a postcode of 6432. Free boulder business listing! 1Tyreright Boulder-Kalgoorlie18 Moran St, Boulder WA 6432, Australia 08 9093 06002Somerville Weed & Pest Control288 Burt Street, Boulder WA, Australia 0414 261 3343Boulder Primary SchoolLane St 08 90931295 View more business listings in boulder Search and find other Postcodes in Western Australia or widen the search to Postcodes in Australia.