DNS delegation of j.subnet.rcn.com updated: May 26, 2013 1:18:47 AM
Delegation
step
query
auth
servers
1
j.subnet.rcn.com.
.
(b,m,a,j,i,l,h,e,k,g,f,c,d).root-servers.net.
2
j.subnet.rcn.com.
com.
(h,i,k,m,e,d,l,g,c,j,f,a,b).gtld-servers.net.
3
j.subnet.rcn.com.
rcn.com.
(auth4,auth2,auth1,auth3).dns.rcn.net.
We pick b.root-servers.net, one of the 13 root servers (1), and ask it about j.subnet.rcn.com and learn that com is delegated to 13 name servers (2), so we ask h.gtld-servers.net where we learn that rcn.com is delegated to four name servers, including auth4.dns.rcn.net (3), so we ask that one and get the following answer:
J.subnet.rcn.com is a domain controlled by four domain name servers at rcn.net having a total of five IP numbers. Some of them are on the same IP network.