Actually no. The first step would be to go directly and query the nameservers set in the whois record (not the registrars which could be wrong but the registry)

Actually no. The first step would be to go directly and query the nameservers set in the whois record (not the registrars which could be wrong but the registry). For xbox.com that is: Name Server: NS1.MSFT.NET Name Server: NS2.MSFT.NET Name Server: NS3.MSFT.NET Name Server: NS4.MSFT.NET Name Server: NS5.MSFT.NET