| step | query | auth | servers |
| 1 | 76.158.220.66.in-addr.arpa. | . | (j,m,a,i,l,d,c,b,h,f,k,g,e).root-servers.net. |
| 2 | 76.158.220.66.in-addr.arpa. | in-addr.arpa. | (a,b,f,e,d,c).in-addr-servers.arpa. |
| 3 | 76.158.220.66.in-addr.arpa. | 66.in-addr.arpa. | (z,w,r,u,t,y,x,v).arin.net. |
| 4 | 76.158.220.66.in-addr.arpa. | 158.220.66.in-addr.arpa. | (a,b).ns.facebook.com. |
We pick