| step | query | auth | servers |
| 1 | 253.0.18.64.in-addr.arpa. | . | (b,c,m,l,a,f,k,h,d,e,g,j,i).root-servers.net. |
| 2 | 253.0.18.64.in-addr.arpa. | in-addr.arpa. | (b,d,e,a,c,f).in-addr-servers.arpa. |
| 3 | 253.0.18.64.in-addr.arpa. | 64.in-addr.arpa. | (z,r,x,w,y,u,t,v).arin.net. |
| 4 | 253.0.18.64.in-addr.arpa. | 0.18.64.in-addr.arpa. | (ns3,ns2,ns4,ns1).google.com. |
We pick