| step | query | auth | servers |
| 1 | 40.247.171.69.in-addr.arpa. | . | (a,g,b,f,i,l,e,d,j,k,c,h,m).root-servers.net. |
| 2 | 40.247.171.69.in-addr.arpa. | in-addr.arpa. | (c,b,e,f,d,a).in-addr-servers.arpa. |
| 3 | 40.247.171.69.in-addr.arpa. | 69.in-addr.arpa. | (v,y,u,x,r,t,w,z).arin.net. |
| 4 | 40.247.171.69.in-addr.arpa. | 247.171.69.in-addr.arpa. | (b,a).ns.facebook.com. |
We pick