I also checked and it appears to be the case. However, weirdly enough the original ycombinator.com domain is registered through Gandi, and the addresses given f

I also checked and it appears to be the case. However, weirdly enough the original ycombinator.com domain is registered through Gandi, and the addresses given for Y Combinator are just Gandi's address. If they did register hacker.news, they did it also through Gandi but this time they seemed to actually put their address in CA.