three-hummock-island postcode tas Home ›› Postcode Finder ›› TAS ›› Three-Hummock-Island Three Hummock Island local listingsThe suburb of Three Hummock Island is located in TAS and has a postcode of 7330. Free three hummock island business listing! Get the first free listing in three hummock island! Search and find other Postcodes in Tasmania or widen the search to Postcodes in Australia.