DNS delegation of igoogle.us updated: May 21, 2013 4:42:45 PM
Delegation
step
query
auth
servers
1
igoogle.us.
.
(i,k,b,l,j,g,d,e,a,c,f,h,m).root-servers.net.
2
igoogle.us.
us.
(a,k,c,e,b,f).cctld.us.
3
igoogle.us.
igoogle.us.
(ns64,ns63).domaincontrol.com.
We pick i.root-servers.net, one of the 13 root servers (1), and ask it about igoogle.us and learn that us is delegated to six name servers (2), so we ask a.cctld.us where we learn that igoogle.us is delegated to two name servers, including ns64.domaincontrol.com (3), so we ask that one and get the following answer:
Igoogle.us is a domain controlled by two domain name servers at domaincontrol.com having a total of four IP numbers. All four of them are on different IP networks. Incoming mail for igoogle.us is handled by two mail servers at secureserver.net having a total of three IP numbers. There are three duplicated IP numbers. Two of them are on the same IP network. Igoogle.us has one IP number (184.168.221.81), but the reverse is ip-184-168-221-81.ip.secureserver.net.