| step | query | auth | servers |
| 1 | 36.21.19.89.in-addr.arpa. | . | (k,h,m,b,j,i,g,l,e,a,c,f,d).root-servers.net. |
| 2 | 36.21.19.89.in-addr.arpa. | in-addr.arpa. | (e,b,c,f,d,a).in-addr-servers.arpa. |
| 3 | 36.21.19.89.in-addr.arpa. | 89.in-addr.arpa. | sec3.apnic.net. ns3.nic.fr. tinnie.arin.net. pri.authdns.ripe.net. sns-pb.isc.org. sec1.apnic.net. |
| 4 | 36.21.19.89.in-addr.arpa. | 21.19.89.in-addr.arpa. | (ns1,ns2).natrohost.com. |
We pick