| step | query | auth | servers |
| 1 | 42.188.90.64.in-addr.arpa. | . | (i,m,l,b,g,d,c,j,a,f,k,h,e).root-servers.net. |
| 2 | 42.188.90.64.in-addr.arpa. | in-addr.arpa. | (b,d,c,f,e,a).in-addr-servers.arpa. |
| 3 | 42.188.90.64.in-addr.arpa. | 64.in-addr.arpa. | (t,x,dill,u,w,z,v,y).arin.net. |
| 4 | 42.188.90.64.in-addr.arpa. | 188.90.64.in-addr.arpa. | (auth2,auth1).ns.nyi.net. |
We pick