We pick j.root-servers.net, one of the 13 root servers (1), and ask it about yahoo.cl and learn that cl is delegated to six name servers (2), so we ask c.nic.cl where we learn that yahoo.cl is delegated to four name servers, including ns4.yahoo.com (3), so we ask that one and get the following answer:
Yahoo.cl is a domain controlled by five domain name servers at yahoo.com. All five of them are on different IP networks. Incoming mail for yahoo.cl is handled by three mail servers at yahoodns.net having a total of 16 IP numbers. There are 32 duplicated IP numbers. Some of them are on the same IP network. Yahoo.cl has two IP numbers (188.8.131.52, 184.108.40.206). Both are on different IP networks.
The five name servers ns1, ns2, ns3, ns4 and ns5.yahoo.com together
Two thirds of the several thousand of domains that use name server group 1 point to IP group 1 (example: yaohoo.com, broadcastyahoo.us and yahoomailsearch.com ). Worth noting is that most of the host names that point to IP group 1 use name server group 1.
The name server ns1.yahoo.com
There are several thousand of domains that use the name server ns1.yahoo.com.