| step | query | auth | servers |
| 1 | 163.160.91.81.in-addr.arpa. | . | (k,i,j,b,a,e,c,d,g,h,f,m,l).root-servers.net. |
| 2 | 163.160.91.81.in-addr.arpa. | in-addr.arpa. | (d,f,a,e,c,b).in-addr-servers.arpa. |
| 3 | 163.160.91.81.in-addr.arpa. | 81.in-addr.arpa. | sns-pb.isc.org. ns3.nic.fr. sec1.apnic.net. sec3.apnic.net. pri.authdns.ripe.net. tinnie.arin.net. |
| 4 | 163.160.91.81.in-addr.arpa. | 160.91.81.in-addr.arpa. | (ns2,ns1,ns3).denic.de. |
We pick