We pick m.root-servers.net, one of the 13 root servers (1), and ask it about 94.45.125.in-addr.arpa and learn that in-addr.arpa is delegated to six name servers (2), so we ask e.in-addr-servers.arpa where we learn that 125.in-addr.arpa is delegated to seven name servers, including ns2.lacnic.net (3), so we ask that one and learn that 45.125.in-addr.arpa is delegated to two name servers (4), so we ask ns.halyptt.net.cn and get the following answer: