We pick i.root-servers.net, one of the 13 root servers (1), and ask it about terratv.com.br and learn that br is delegated to six name servers (2), so we ask c.dns.br where we learn that terratv.com.br is delegated to four name servers, including d.dns.terra.com.br (3), so we ask that one and get the following answer:
One quarter of them use name server group 1. Worth noting is that seven percent of the domains that use name server group 1 use only the mail server vip-us-br-mx.terra.com.
The IP number 200.154.56.80
There are about fifty host names that point to the IP number 200.154.56.80.
The four name servers a.dns.terra.com, c.dns.terra.com, b.dns.terra.com.br and d.dns.terra.com.br t…
There are several hundred of domains that use name server group 1.
Seven percent of those use only the mail server vip-us-br-mx.terra.com. Worth noting is that every fifth of the domains that only use the mail server vip-us-br-mx.terra.com use name server group 1.