| step | query | auth | servers |
| 1 | 151.72.55.65.in-addr.arpa. | . | (l,b,c,j,k,g,e,d,h,f,m,i,a).root-servers.net. |
| 2 | 151.72.55.65.in-addr.arpa. | in-addr.arpa. | (d,f,c,a,b,e).in-addr-servers.arpa. |
| 3 | 151.72.55.65.in-addr.arpa. | 65.in-addr.arpa. | (x,v,y,t,w,u,z,r).arin.net. |
| 4 | 151.72.55.65.in-addr.arpa. | 55.65.in-addr.arpa. | (ns4,ns1,ns3,ns2,ns5).msft.net. |
We pick