| step | query | auth | servers |
| 1 | 11.31.245.210.in-addr.arpa. | . | (g,l,j,d,b,f,e,c,m,k,i,a,h).root-servers.net. |
| 2 | 11.31.245.210.in-addr.arpa. | in-addr.arpa. | (c,d,b,f,e,a).in-addr-servers.arpa. |
| 3 | 11.31.245.210.in-addr.arpa. | 210.in-addr.arpa. | apnic1.dnsnode.net. tinnie.arin.net. ns4.apnic.net. ns3.apnic.net. dns1.telstra.net. ns1.apnic.net. sec1.authdns.ripe.net. |
| 4 | 11.31.245.210.in-addr.arpa. | 31.245.210.in-addr.arpa. | (dns1,dns2).hcm.fpt.vn. |
We pick