DNS delegation of a.a203.com updated: May 23, 2013 4:06:37 PM
Delegation
step
query
auth
servers
1
a.a203.com.
.
(k,g,c,l,e,f,b,i,m,a,d,j,h).root-servers.net.
2
a.a203.com.
com.
(a,l,b,k,j,g,e,i,c,d,h,m,f).gtld-servers.net.
3
a.a203.com.
a203.com.
(ns1,ns2).72dns.com.
4
kan166.s512.000pc.net.
.
(a,j,e,l,f,d,i,g,c,k,h,b,m).root-servers.net.
5
kan166.s512.000pc.net.
net.
(l,e,d,f,g,c,a,j,b,i,k,m,h).gtld-servers.net.
6
kan166.s512.000pc.net.
000pc.net.
(ns10,ns9).72dns.com.
7
s512.72dns.net.
net.
(a,j,f,e,m,i,h,k,b,c,l,g,d).gtld-servers.net.
8
s512.72dns.net.
72dns.net.
(ns10,ns9).72dns.com.
9
h512.72dns.net.
72dns.net.
(ns10,ns9).72dns.com.
We pick k.root-servers.net, one of the 13 root servers (1), and ask it about a.a203.com and learn that com is delegated to 13 name servers (2), so we ask a.gtld-servers.net where we learn that a203.com is delegated to two name servers, including ns1.72dns.com (3), so we ask that one where we see a CNAME from a.a203.com to kan166.s512.000pc.net, so we have to start all over again. We pick a.root-servers.net, one of the 13 root servers (4), and ask it about kan166.s512.000pc.net and learn that net is delegated to 13 name servers (5), so we ask l.gtld-servers.net where we learn that 000pc.net is delegated to two name servers, including ns10.72dns.com (6), so we ask that one and see a second CNAME from kan166.s512.000pc.net to s512.72dns.net. We start over for the third time and we already know that a.gtld-servers.net is authoritative for net (7) and ask it about s512.72dns.net and learn that 72dns.net is delegated to two name servers (8), so we ask ns10.72dns.com and see yet another CNAME from s512.72dns.net to h512.72dns.net. We have yet again to start all over and we already know that ns10.72dns.com is authoritative for 72dns.net (9) and ask it about h512.72dns.net and get the following answer:
