DNS delegation of vn-yahoo.net updated: May 19, 2013 8:07:25 PM
We pick f.root-servers.net, one of the 13 root servers (1), and ask it about vn-yahoo.net and learn that net is delegated to 13 name servers (2), so we ask j.gtld-servers.net where we learn that vn-yahoo.net is delegated to five name servers, including ns5.yahoo.com (3), so we ask that one and get the following answer:
The five name servers ns1, ns2, ns3, ns4 and ns5.yahoo.com together
Three quarter of the more than hundred domains that use name server group 1 point to IP group 1 (example: dlsyahoo.com, emailyahoomail.com and findchatingyahoo.com ). Worth noting is that most of the host names that point to IP group 1 use name server group 1.