DNS delegation of 69.171.224.55 updated: Jun 19, 2013 11:19:51 AM
Delegation
step
query
auth
servers
1
55.224.171.69.in-addr.arpa.
.
(b,a,k,i,m,d,g,h,l,e,j,f,c).root-servers.net.
2
55.224.171.69.in-addr.arpa.
in-addr.arpa.
(f,d,b,e,c,a).in-addr-servers.arpa.
3
55.224.171.69.in-addr.arpa.
69.in-addr.arpa.
(y,r,z,w,v,u,t,x).arin.net.
4
55.224.171.69.in-addr.arpa.
224.171.69.in-addr.arpa.
(b,a).ns.facebook.com.
We pick b.root-servers.net, one of the 13 root servers (1), and ask it about 55.224.171.69.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 y.arin.net (3), so we ask that one and learn that 224.171.69.in-addr.arpa is delegated to two name servers (4), so we ask b.ns.facebook.com and get the following answer: