DNS delegation of 69.171.242.74 updated: May 21, 2013 11:23:53 AM
Delegation
step
query
auth
servers
1
74.242.171.69.in-addr.arpa.
.
(d,m,g,f,b,e,i,c,a,j,h,k,l).root-servers.net.
2
74.242.171.69.in-addr.arpa.
in-addr.arpa.
(f,d,c,e,a,b).in-addr-servers.arpa.
3
74.242.171.69.in-addr.arpa.
69.in-addr.arpa.
(w,t,x,v,r,y,u,z).arin.net.
4
74.242.171.69.in-addr.arpa.
242.171.69.in-addr.arpa.
(b,a).ns.facebook.com.
We pick d.root-servers.net, one of the 13 root servers (1), and ask it about 74.242.171.69.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 69.in-addr.arpa is delegated to eight name servers, including w.arin.net (3), so we ask that one and learn that 242.171.69.in-addr.arpa is delegated to two name servers (4), so we ask b.ns.facebook.com and get the following answer: