DNS delegation of bol.com.au updated: May 21, 2013 7:28:48 AM
Delegation
step
query
auth
servers
1
bol.com.au.
.
(e,c,m,h,j,k,i,b,a,l,d,g,f).root-servers.net.
2
bol.com.au.
au.
(l,b,r,m,s,p,n,o,v,a,u).au.
3
bol.com.au.
bol.com.au.
(ns3,ns1,ns2).netregistry.net.
We pick e.root-servers.net, one of the 13 root servers (1), and ask it about bol.com.au and learn that au is delegated to eleven name servers (2), so we ask l.au where we learn that bol.com.au is delegated to three name servers, including ns3.netregistry.net (3), so we ask that one and get the following answer:
Bol.com.au is a domain controlled by three domain name servers at yourdnshost.net. Two of them are on the same IP network. Incoming mail for bol.com.au is handled by one mail server at jblue.com.au having a total of two IP numbers. Both are on different IP networks. Bol.com.au has one IP number (103.4.234.48), but the reverse is vps.jblue.com.au.
Eleven of the twelve domains that only use the mail server vps.jblue.com.au point only to the IP number 103.4.234.48. Worth noting is that eleven of the host names that point only to the IP number 103.4.234.48 use only the mail server vps.jblue.com.au.
The three name servers ns1, ns2 and ns3.yourdnshost.net together
There are several thousand of domains that use name server group 1.