| step | query | auth | servers |
| 1 | 201.128.28.189.in-addr.arpa. | . | (d,k,l,b,j,c,h,i,e,f,a,g,m).root-servers.net. |
| 2 | 201.128.28.189.in-addr.arpa. | in-addr.arpa. | (a,f,e,b,d,c).in-addr-servers.arpa. |
| 3 | 201.128.28.189.in-addr.arpa. | 189.in-addr.arpa. | ns3.afrinic.net. a.arpa.dns.br. sec1.authdns.ripe.net. ns2.lacnic.net. sec3.apnic.net. ns.lacnic.net. ns-lacnic.nic.mx. tinnie.arin.net. |
| 4 | 201.128.28.189.in-addr.arpa. | 128.28.189.in-addr.arpa. | (trty88,trty89).saude.gov.br. |
We pick