LZ 127 Graf Zeppelin (Deutsches Luftschiff Zeppelin #127; Registration: D-LZ 127) was a German-built and -operated, passenger-carrying, hydrogen-filled, rigid airship which operated commercially from 1928 to 1937. It was named after the German pioneer of airships, Ferdinand von Zeppelin, who was a count (Graf) in the German nobility. During its operating life, the airship made 590 flights covering more than a million miles (1.6 million km).