DNS delegation of 198.117.0 updated: May 22, 2013 8:23:02 PM
Delegation
step
query
auth
servers
1
0.117.198.in-addr.arpa.
.
(k,h,m,l,g,d,b,e,f,j,c,i,a).root-servers.net.
2
0.117.198.in-addr.arpa.
in-addr.arpa.
(f,a,b,d,c,e).in-addr-servers.arpa.
3
0.117.198.in-addr.arpa.
198.in-addr.arpa.
(z,u,x,w,t,y,v,r).arin.net.
4
0.117.198.in-addr.arpa.
117.198.in-addr.arpa.
(ns1,ns2,ns3).nasa.gov.
We pick k.root-servers.net, one of the 13 root servers (1), and ask it about 0.117.198.in-addr.arpa and learn that in-addr.arpa is delegated to six name servers (2), so we ask f.in-addr-servers.arpa where we learn that 198.in-addr.arpa is delegated to eight name servers, including z.arin.net (3), so we ask that one and learn that 117.198.in-addr.arpa is delegated to three name servers (4), so we ask ns1.nasa.gov and get the following answer: