DNS delegation of www.google.co updated: Jun 20, 2013 11:47:01 AM
Delegation
step
query
auth
servers
1
www.google.co.
.
(l,e,g,j,h,m,d,b,c,k,i,a,f).root-servers.net.
2
www.google.co.
co.
(ns3,ns1,ns6,ns2,ns4,ns5).cctld.co.
3
www.google.co.
google.co.
(ns2,ns4,ns1,ns3).google.com.
4
www3.l.google.com.
.
(b,h,m,f,k,l,e,c,a,j,g,d,i).root-servers.net.
5
www3.l.google.com.
com.
(k,l,h,e,b,j,m,c,i,g,f,a,d).gtld-servers.net.
6
www3.l.google.com.
google.com.
(ns3,ns1,ns4,ns2).google.com.
We pick l.root-servers.net, one of the 13 root servers (1), and ask it about www.google.co and learn that co is delegated to six name servers (2), so we ask ns3.cctld.co where we learn that google.co is delegated to four name servers, including ns2.google.com (3), so we ask that one where we see a CNAME from www.google.co to www3.l.google.com, so we have to start all over again. We pick b.root-servers.net, one of the 13 root servers (4), and ask it about www3.l.google.com and learn that com is delegated to 13 name servers (5), so we ask k.gtld-servers.net where we learn that google.com is delegated to four name servers, including ns3.google.com (6), so we ask that one and get the following answer:
About one in six of the more than a thousands host names that point to the IP number 173.194.33.7 use name server group 1 (example: like.com, youtube.it and goo.gl ).
The IP number 74.125.237.6
There are more than a thousands host names that point to the IP number 74.125.237.6.
