The codes were revised in 2017, so yours may have changed.
711215 Independent athletes performing before a paying audience
711512 independent celebrities, such as athletes, engaged in endorsement, speaking and similar services
611620 Athletic instruction
You can also look up your industry code on the Stats Can website: http://www23.statcan.gc.ca/imdb/p3VD.pl?Function=getVD&TVD=380372
Or you can use the search tools on the NAICS website: https://www.naics.com/search/