We pick g.root-servers.net, one of the 13 root servers (1), and ask it about yahoomail.co.za and learn that za is delegated to five name servers (2), so we ask disa.tenet.ac.za where we learn that co.za is delegated to seven name servers, including ns0.is.co.za (3), so we ask that one and learn that yahoomail.co.za is delegated to five name servers (4), so we ask ns3.yahoo.com and get the following answer:
Yahoomail.co.za is a domain controlled by five domain name servers at yahoo.com. All five of them are on different IP networks. Incoming mail for yahoomail.co.za is handled by one mail server at .. We are missing the IP:s of one server: .. Yahoomail.co.za has two IP numbers (68.180.206.184, 98.139.102.145). Both are on different IP networks.
Yahoomail.co.za is ranked #9043280 world wide and is hosted on two servers in Sunnyvale, CA, United States even though the hostname implies South Africa. It has one inlink.
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: yahoo-japan.net, yahoodomains-experience.com and 1800-myahoo.com ). Worth noting is that most of the host names that point to IP group 1 use name server group 1.
