DNS delegation of 0.172.206 updated: May 22, 2013 7:14:40 AM
Delegation
step
query
auth
servers
1
206.172.0.in-addr.arpa.
.
(i,c,a,j,h,f,l,d,k,b,m,g,e).root-servers.net.
2
206.172.0.in-addr.arpa.
in-addr.arpa.
(f,d,e,c,a,b).in-addr-servers.arpa.
We pick i.root-servers.net, one of the 13 root servers (1), and ask it about 206.172.0.in-addr.arpa and learn that in-addr.arpa is delegated to six name servers (2), so we ask f.in-addr-servers.arpa and get the following answer: