DNS delegation of yahoomail.com.br updated: May 21, 2013 9:40:03 AM
Delegation
step
query
auth
servers
1
yahoomail.com.br.
.
(m,f,d,i,c,g,a,j,h,l,k,b,e).root-servers.net.
2
yahoomail.com.br.
br.
(c,b,f,d,a,e).dns.br.
3
yahoomail.com.br.
yahoomail.com.br.
(ns5,ns1,ns2,ns4,ns3).yahoo.com.
We pick m.root-servers.net, one of the 13 root servers (1), and ask it about yahoomail.com.br and learn that br is delegated to six name servers (2), so we ask c.dns.br where we learn that yahoomail.com.br 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 the two IP numbers 68.180.206.184 and 98.139.102.145 together, hereafter referred to as "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.
The mail server. Only
There are about seventy domains that only use the mail server ..