We pick i.root-servers.net, one of the 13 root servers (1), and ask it about yahoo.im and learn that im is delegated to four name servers (2), so we ask pebbles.iom.com where we learn that yahoo.im is delegated to five name servers, including ns7.yahoo.com (3), so we ask that one and get the following answer:
Yahoo.im is a domain controlled by four domain name servers at yahoo.com. All four of them are on different IP networks. Incoming mail for yahoo.im is handled by one mail server at .. We are missing the IP:s of one server: .. Yahoo.im has two IP numbers (68.180.206.184, 98.139.102.145). Both are on different IP networks.
Yahoo.im is hosted on two servers in Sunnyvale, CA, United States even though the hostname implies Isle Of Man.
The mail server.
All of the more than hundred domains that use the mail server . use only the mail server . (example: alpslab.com, axelprod.com and bandfm.com ).
The two IP numbers 68.180.206.184 and 98.139.102.145 together
Most of the more than hundred 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", use the five name servers ns1, ns2, ns3, ns4 and ns5.yahoo.com together, hereafter referred to as "name server group 1", (example: plusyahoo.biz, yahoonorway.biz and 18seconds.com ). Worth noting is that one quarter 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
Three quarter of the several hundred of domains that use name server group 1 point to IP group 1 (example: altavista.ch, altavistausa.com and bloghoogle.com ). Worth noting is that most of the host names that point to IP group 1 use name server group 1.
The mail server. Only
There are more than hundred domains that only use the mail server ..
