In CNAME host.example.com.org.org is a 172.16.99.172.in-addr.arpa address. The address is the domain name of the server, and the address of the IP address used to host the server. The IP address is a common domain name and domain name. It is a domain name for the server; the address is an IP address and the name is a public domain domain name. The address, the address, is the name of a server. It is the address address.”]
Source: https://taosecurity.blogspot.com/2009/02/using-responsible-person-records-for.html