DNS delegation of 68.180.131 updated: May 22, 2013 7:48:35 PM
Delegation
step
query
auth
servers
1
131.180.68.in-addr.arpa.
.
(f,h,j,a,i,m,e,c,d,k,g,l,b).root-servers.net.
2
131.180.68.in-addr.arpa.
in-addr.arpa.
(c,d,f,e,b,a).in-addr-servers.arpa.
3
131.180.68.in-addr.arpa.
68.in-addr.arpa.
(y,t,u,z,x,r,v,w).arin.net.
4
131.180.68.in-addr.arpa.
131.180.68.in-addr.arpa.
(ns3,ns5,ns4,ns1,ns2).yahoo.com.
We pick f.root-servers.net, one of the 13 root servers (1), and ask it about 131.180.68.in-addr.arpa and learn that in-addr.arpa is delegated to six name servers (2), so we ask c.in-addr-servers.arpa where we learn that 68.in-addr.arpa is delegated to eight name servers, including y.arin.net (3), so we ask that one and learn that 131.180.68.in-addr.arpa is delegated to five name servers (4), so we ask ns3.yahoo.com and get the following answer: