The National Rugby League (NRL) is the top competition of professional rugby league football clubs in Australasia. The NRL's main competition (known as the Telstra Premiership for sponsorship reasons), is contested by sixteen teams, fifteen of which are based in Australia with one based in New Zealand. It is the Southern Hemisphere's elite rugby league championship and, per season, is the single most attended rugby league football competition in the world.

Source: Wikipedia.org