DNS delegation of 72.52.2.1 updated: Jun 20, 2013 12:14:09 AM
Delegation
step
query
auth
servers
1
1.2.52.72.in-addr.arpa.
.
(f,e,h,b,g,j,i,a,k,l,c,d,m).root-servers.net.
2
1.2.52.72.in-addr.arpa.
in-addr.arpa.
(e,b,c,d,f,a).in-addr-servers.arpa.
3
1.2.52.72.in-addr.arpa.
72.in-addr.arpa.
(w,v,y,x,t,u,r,z).arin.net.
4
1.2.52.72.in-addr.arpa.
2.52.72.in-addr.arpa.
(ns1,ns2).prolexic.net.
We pick f.root-servers.net, one of the 13 root servers (1), and ask it about 1.2.52.72.in-addr.arpa and learn that in-addr.arpa is delegated to six name servers (2), so we ask e.in-addr-servers.arpa where we learn that 72.in-addr.arpa is delegated to eight name servers, including w.arin.net (3), so we ask that one and learn that 2.52.72.in-addr.arpa is delegated to two name servers (4), so we ask ns1.prolexic.net and get the following answer: