DNS delegation of 172.207 updated: Jun 20, 2013 2:23:01 AM
Delegation
step
query
auth
servers
1
207.172.in-addr.arpa.
.
(e,m,g,a,j,h,d,b,f,i,c,k,l).root-servers.net.
2
207.172.in-addr.arpa.
in-addr.arpa.
(e,b,d,a,c,f).in-addr-servers.arpa.
3
207.172.in-addr.arpa.
172.in-addr.arpa.
(t,u,z,v,y,w,r,x).arin.net.
4
207.172.in-addr.arpa.
207.172.in-addr.arpa.
(daha-07,daha-01,daha-02).ns.aol.com.
We pick e.root-servers.net, one of the 13 root servers (1), and ask it about 207.172.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 172.in-addr.arpa is delegated to eight name servers, including t.arin.net (3), so we ask that one and learn that 207.172.in-addr.arpa is delegated to three name servers (4), so we ask daha-07.ns.aol.com and get the following answer: