| step | query | auth | servers |
| 1 | 10.0.245.210.in-addr.arpa. | . | (l,g,j,m,k,d,f,a,e,i,c,b,h).root-servers.net. |
| 2 | 10.0.245.210.in-addr.arpa. | in-addr.arpa. | (c,e,d,f,b,a).in-addr-servers.arpa. |
| 3 | 10.0.245.210.in-addr.arpa. | 210.in-addr.arpa. | tinnie.arin.net. sec1.authdns.ripe.net. dns1.telstra.net. ns1.apnic.net. ns4.apnic.net. ns3.apnic.net. apnic1.dnsnode.net. |
| 4 | 10.0.245.210.in-addr.arpa. | 0.245.210.in-addr.arpa. | (dns1,dns2).fpt.vn. |
We pick