| step | query | auth | servers |
| 1 | 53.138.4.199.in-addr.arpa. | . | (f,i,a,d,k,g,h,c,m,l,j,b,e).root-servers.net. |
| 2 | 53.138.4.199.in-addr.arpa. | in-addr.arpa. | (c,f,b,d,a,e).in-addr-servers.arpa. |
| 3 | 53.138.4.199.in-addr.arpa. | 199.in-addr.arpa. | (z,v,u,x,w,t,y,r).arin.net. |
| 4 | 53.138.4.199.in-addr.arpa. | 138.4.199.in-addr.arpa. | c.iana-servers.net. b.iana-servers.net. ns.icann.org. a.iana-servers.net. |
We pick