| step | query | auth | servers |
| 1 | 81.190.21.217.in-addr.arpa. | . | (a,i,l,h,b,j,m,d,f,g,c,k,e).root-servers.net. |
| 2 | 81.190.21.217.in-addr.arpa. | in-addr.arpa. | (d,c,a,e,b,f).in-addr-servers.arpa. |
| 3 | 81.190.21.217.in-addr.arpa. | 217.in-addr.arpa. | tinnie.arin.net. ns3.nic.fr. sec3.apnic.net. sns-pb.isc.org. pri.authdns.ripe.net. sec1.apnic.net. |
| 4 | 81.190.21.217.in-addr.arpa. | 190.21.217.in-addr.arpa. | (ns4,ns3).combell.net. |
We pick