| step | query | auth | servers |
| 1 | 50.135.120.193.in-addr.arpa. | . | (j,d,b,l,g,k,e,f,a,m,i,c,h).root-servers.net. |
| 2 | 50.135.120.193.in-addr.arpa. | in-addr.arpa. | (c,f,a,d,b,e).in-addr-servers.arpa. |
| 3 | 50.135.120.193.in-addr.arpa. | 193.in-addr.arpa. | ns3.nic.fr. sec3.apnic.net. sec1.apnic.net. tinnie.arin.net. sns-pb.isc.org. pri.authdns.ripe.net. |
| 4 | 50.135.120.193.in-addr.arpa. | 120.193.in-addr.arpa. | sec02.ns.esat.net. ns.ripe.net. auth02.ns.esat.net. |
We pick