NO.1
You can view the network segment host, site ranking, IP, operating system version, etc. of the subdomain website: https://sitereport.netcraft.com/
NO.2
You can get the IP reverse query result, but you need to go online scientifically : http://www.ip-adress.com/reverse_ip/
NO.3
You can query the domain name, reverse-check IP, etc.: http://www.7c.com/
