| step | query | auth | servers |
| 1 | 240.10.168.192.in-addr.arpa. | . | (m,h,a,d,e,j,c,b,g,l,f,i,k).root-servers.net. |
| 2 | 240.10.168.192.in-addr.arpa. | in-addr.arpa. | (e,d,a,f,c,b).in-addr-servers.arpa. |
| 3 | 240.10.168.192.in-addr.arpa. | 192.in-addr.arpa. | (z,y,t,u,x,w,v,r).arin.net. |
| 4 | 240.10.168.192.in-addr.arpa. | 168.192.in-addr.arpa. | (blackhole-1,blackhole-2).iana.org. |
We pick