DNS delegation of yahoomail.dk updated: May 26, 2013 3:58:05 AM
Delegation
step
query
auth
servers
1
yahoomail.dk.
.
(k,j,c,i,e,m,b,f,h,d,l,a,g).root-servers.net.
2
yahoomail.dk.
dk.
(c,l,b,a,s,p).nic.dk.
3
yahoomail.dk.
yahoomail.dk.
(ns4,ns2,ns3,ns5,ns1).yahoo.com.
We pick k.root-servers.net, one of the 13 root servers (1), and ask it about yahoomail.dk and learn that dk is delegated to six name servers (2), so we ask c.nic.dk where we learn that yahoomail.dk is delegated to five name servers, including ns4.yahoo.com (3), so we ask that one and get the following answer:
Yahoomail.dk 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.dk is handled by one mail server at .. We are missing the IP:s of one server: .. Yahoomail.dk has two IP numbers (68.180.206.184, 98.139.102.145). Both are on different IP networks.