We pick a.root-servers.net, one of the 13 root servers (1), and ask it about yahoomail.com.ar and learn that ar is delegated to five name servers (2), so we ask ns2.switch.ch where we learn that yahoomail.com.ar is delegated to five name servers, including ns2.yahoo.com (3), so we ask that one and get the following answer:
Yahoomail.com.ar is hosted on two servers in Sunnyvale, CA, United States even though the hostname implies Argentina.
The two IP numbers 68.180.206.184 and 98.139.102.145 together
There are several thousand of host names that point to the two IP numbers 68.180.206.184 and 98.139.102.145 together, hereafter referred to as "IP group 1".
Most of those use the five name servers ns1, ns2, ns3, ns4 and ns5.yahoo.com together, hereafter referred to as "name server group 1", (example: exyahoomail.com, parksyahoo.com and saudiyahoo.com ). Worth noting is that two thirds of the domains that use name server group 1 point to IP group 1.
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: fumble.com, yahoo.com.bd and mapsyahoo.com ). Worth noting is that three quarter of the host names that point to IP group 1 use name server group 1.
The IP number 98.139.102.145
There are several thousand of host names that point to the IP number 98.139.102.145.
