The Rabbitohs' traditional heartland covers the once typically working-class suburbs of inner-south Sydney. The club is based in Redfern, where the club's administration and training facilities are located, however they have long held a wide supporter base spread all over New South Wales. The team's home ground is currently Stadium Australia in Sydney Olympic Park. In the New South Wales Rugby League (1908–1994), Australian Rugby League (1995–1997), and National Rugby League (1998-1999, 2002–present) competitions South Sydney are the most successful professional team in the history of Australian rugby league in terms of total championships won, having claimed 20 NSW first grade premierships, and one NRL premiership. In addition to winning the most premierships, the Rabbitohs also hold the distinction of being the only NSW club to win a premiership in their inaugural season.