| step | query | auth | servers |
| 1 | 40.192.136.193.in-addr.arpa. | . | (d,j,a,b,c,m,e,i,l,g,f,h,k).root-servers.net. |
| 2 | 40.192.136.193.in-addr.arpa. | in-addr.arpa. | (c,a,b,d,e,f).in-addr-servers.arpa. |
| 3 | 40.192.136.193.in-addr.arpa. | 193.in-addr.arpa. | ns3.nic.fr. sns-pb.isc.org. sec3.apnic.net. pri.authdns.ripe.net. tinnie.arin.net. sec1.apnic.net. |
| 4 | 40.192.136.193.in-addr.arpa. | 136.193.in-addr.arpa. | ns01.fccn.pt. ns-rev.dns.pt. marco.uminho.pt. ns02.fccn.pt. |
| 5 | 40.192.136.193.in-addr.arpa. | 192.136.193.in-addr.arpa. | (ns01,ns02).fccn.pt. |
We pick