We pick k.root-servers.net, one of the 13 root servers (1), and ask it about caissedesdepots.fr and learn that fr is delegated to five name servers (2), so we ask f.ext.nic.fr where we learn that caissedesdepots.fr is delegated to four name servers, including dns.caissedesdepots.fr (3), so we ask that one and get the following answer:
The four name servers dns, dns2, dns3 and dns5.caissedesdepots.fr together
There are more than hundred domains that use name server group 1.
Most of those use mail server group 1 (example: informatiquecdc.com, appuipme.com and fondsdereserve.net ). Worth noting is that three quarter of the domains that use mail server group 1 use name server group 1.
Ten of them point to IP group 1.
The two mail servers mail1 and mail2.caissedesdepots.fr together
Three quarter of the more than hundred domains that use mail server group 1 use name server group 1 (example: ircantec.com, cdc-tiersmonde.org and ixisventures.com ). Worth noting is that most of the domains that use name server group 1 use mail server group 1.
The two IP numbers 212.157.112.154 and 213.41.72.154 together
All of the ten host names that point to IP group 1 use mail server group 1.
The IP number 213.41.72.154
Ten of the eleven host names that point to the IP number 213.41.72.154 use mail server group 1.
