DNS delegation of yahoomail.com.au updated: May 19, 2013 9:10:49 AM
Delegation
step
query
auth
servers
1
yahoomail.com.au.
.
(e,a,d,c,g,b,k,j,m,l,i,h,f).root-servers.net.
2
yahoomail.com.au.
au.
(b,o,r,a,n,l,p,s,u,v,m).au.
3
yahoomail.com.au.
yahoomail.com.au.
(ns3,ns2,ns4,ns1).yahoo.com.
We pick e.root-servers.net, one of the 13 root servers (1), and ask it about yahoomail.com.au and learn that au is delegated to eleven name servers (2), so we ask b.au where we learn that yahoomail.com.au is delegated to four name servers, including ns3.yahoo.com (3), so we ask that one and get the following answer:
Yahoomail.com.au is hosted on a server in Sydney, 02, Australia.
The mail server.
All of the about seventy domains that use the mail server . use only the mail server . (example: alpslab.com, axelprod.com and bandfm.com ).
The two IP numbers 203.84.217.229 and 206.190.44.70 together
All of the three host names that point to the two IP numbers 203.84.217.229 and 206.190.44.70 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".
The IP number 203.84.217.229
There are more than hundred host names that point to the IP number 203.84.217.229.