blackmans-flat postcode nsw Home ›› Postcode Finder ›› NSW ›› Blackmans-Flat Blackmans Flat local listingsThe suburb of Blackmans Flat is located in NSW and has a postcode of 2790. Free blackmans flat business listing! Get the first free listing in blackmans flat! Search and find other Postcodes in New South Wales or widen the search to Postcodes in Australia.