DNS delegation of 55.50.20 updated: May 22, 2013 1:52:50 AM
Delegation
step
query
auth
servers
1
20.50.55.in-addr.arpa.
.
(a,d,m,c,l,i,g,j,b,k,e,h,f).root-servers.net.
2
20.50.55.in-addr.arpa.
in-addr.arpa.
(b,d,f,c,e,a).in-addr-servers.arpa.
3
20.50.55.in-addr.arpa.
55.in-addr.arpa.
(ns03,ns01,ns02).army.mil.
We pick a.root-servers.net, one of the 13 root servers (1), and ask it about 20.50.55.in-addr.arpa and learn that in-addr.arpa is delegated to six name servers (2), so we ask b.in-addr-servers.arpa where we learn that 55.in-addr.arpa is delegated to three name servers, including ns03.army.mil (3), so we ask that one and get the following answer: