DNS delegation of 72.52.71.2 updated: Jun 18, 2013 8:26:29 PM
Delegation
step
query
auth
servers
1
2.71.52.72.in-addr.arpa.
.
(d,j,e,l,a,i,h,b,f,m,g,c,k).root-servers.net.
2
2.71.52.72.in-addr.arpa.
in-addr.arpa.
(d,a,b,f,e,c).in-addr-servers.arpa.
3
2.71.52.72.in-addr.arpa.
72.in-addr.arpa.
(z,v,t,x,y,r,w,u).arin.net.
4
2.71.52.72.in-addr.arpa.
71.52.72.in-addr.arpa.
(ns5,ns1,ns2,ns3,ns4).he.net.
5
2.0-255.71.52.72.in-addr.arpa.
71.52.72.in-addr.arpa.
(ns5,ns1,ns4,ns3,ns2).he.net.
6
2.0-255.71.52.72.in-addr.arpa.
0-255.71.52.72.in-addr.arpa.
ns2.isc-sns.com. ns1.isc-sns.net.
We pick d.root-servers.net, one of the 13 root servers (1), and ask it about 2.71.52.72.in-addr.arpa and learn that in-addr.arpa is delegated to six name servers (2), so we ask d.in-addr-servers.arpa where we learn that 72.in-addr.arpa is delegated to eight name servers, including z.arin.net (3), so we ask that one and learn that 71.52.72.in-addr.arpa is delegated to five name servers (4), so we ask ns5.he.net where we see a CNAME from 2.71.52.72.in-addr.arpa to 2.0-255.71.52.72.in-addr.arpa, so we have to start all over again. We already know that ns5.he.net is authoritative for 71.52.72.in-addr.arpa (5) and ask it about 2.0-255.71.52.72.in-addr.arpa and learn that 0-255.71.52.72.in-addr.arpa is delegated to two name servers (6), so we ask ns2.isc-sns.com and get the following answer:
