| step | query | auth | servers |
| 1 | 51.39.194.173.in-addr.arpa. | . | (k,f,c,b,e,g,j,m,a,l,i,d,h).root-servers.net. |
| 2 | 51.39.194.173.in-addr.arpa. | in-addr.arpa. | (c,a,d,e,f,b).in-addr-servers.arpa. |
| 3 | 51.39.194.173.in-addr.arpa. | 173.in-addr.arpa. | (z,y,r,x,w,t,v,u).arin.net. |
| 4 | 51.39.194.173.in-addr.arpa. | 194.173.in-addr.arpa. | (ns4,ns2,ns1,ns3).google.com. |
We pick