| step | query | auth | servers |
| 1 | 121.35.87.208.in-addr.arpa. | . | (l,m,k,h,e,i,g,b,j,c,f,a,d).root-servers.net. |
| 2 | 121.35.87.208.in-addr.arpa. | in-addr.arpa. | (a,f,b,e,d,c).in-addr-servers.arpa. |
| 3 | 121.35.87.208.in-addr.arpa. | 208.in-addr.arpa. | (r,x,w,u,t,v,y,z).arin.net. |
| 4 | 121.35.87.208.in-addr.arpa. | 35.87.208.in-addr.arpa. | (ns2,ns1).securehost.com. |
We pick