kains-flat postcode nswst Home ›› Postcode Finder ›› NSWST ›› Kains-Flat Kains Flat local listingsThe suburb of Kains Flat is located in NSW and has a postcode of 2850. Free kains flat business listing! Get the first free listing in kains flat! Search and find other Postcodes in New South Wales or widen the search to Postcodes in Australia.