DNS delegation of 10.90 updated: Jun 18, 2013 10:26:25 PM
Delegation
step
query
auth
servers
1
90.10.in-addr.arpa.
.
(e,m,l,g,a,d,b,h,i,j,f,c,k).root-servers.net.
2
90.10.in-addr.arpa.
in-addr.arpa.
(e,c,f,a,b,d).in-addr-servers.arpa.
3
90.10.in-addr.arpa.
10.in-addr.arpa.
(blackhole-2,blackhole-1).iana.org.
We pick e.root-servers.net, one of the 13 root servers (1), and ask it about 90.10.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 10.in-addr.arpa is delegated to two name servers, including blackhole-2.iana.org (3), so we ask that one and get the following answer: