| step | query | auth | servers |
| 1 | 1.15.168.192.in-addr.arpa. | . | (l,m,e,h,i,k,f,b,a,d,g,j,c).root-servers.net. |
| 2 | 1.15.168.192.in-addr.arpa. | in-addr.arpa. | (c,e,b,a,f,d).in-addr-servers.arpa. |
| 3 | 1.15.168.192.in-addr.arpa. | 192.in-addr.arpa. | (w,y,x,t,u,v,z,r).arin.net. |
| 4 | 1.15.168.192.in-addr.arpa. | 168.192.in-addr.arpa. | (blackhole-1,blackhole-2).iana.org. |
We pick