DNS delegation of 66.220.149.11 updated: May 24, 2013 10:34:33 AM
Delegation
step
query
auth
servers
1
11.149.220.66.in-addr.arpa.
.
(k,f,h,a,c,j,m,i,b,e,l,d,g).root-servers.net.
2
11.149.220.66.in-addr.arpa.
in-addr.arpa.
(d,e,f,b,a,c).in-addr-servers.arpa.
3
11.149.220.66.in-addr.arpa.
66.in-addr.arpa.
(w,r,y,v,x,t,u,z).arin.net.
4
11.149.220.66.in-addr.arpa.
149.220.66.in-addr.arpa.
(a,b).ns.facebook.com.
We pick k.root-servers.net, one of the 13 root servers (1), and ask it about 11.149.220.66.in-addr.arpa and learn that in-addr.arpa is delegated to six name servers (2), so we ask d.in-addr-servers.arpa where we learn that 66.in-addr.arpa is delegated to eight name servers, including w.arin.net (3), so we ask that one and learn that 149.220.66.in-addr.arpa is delegated to two name servers (4), so we ask a.ns.facebook.com and get the following answer: