Searching for 72.209.104.166.in-addr.arpa. PTR record at B.ROOT-SERVERS.NET. [192.228.79.201]
...took 19 ms
Searching for 72.209.104.166.in-addr.arpa. PTR record at a.in-addr-servers.arpa. [199.180.182.53] ...took 152 ms
Searching for 72.209.104.166.in-addr.arpa. PTR record at hynetm.hanyang.ac.kr. [166.104.27.6] ...took 281 ms
Searching for 72.209.104.166.in-addr.arpa. PTR record at a.in-addr-servers.arpa. [199.180.182.53] ...took 152 ms
Searching for y.arin.net. A record at D.ROOT-SERVERS.NET. [199.7.91.13]
...took 11 ms
Searching for y.arin.net. A record at k.gtld-servers.net. [192.52.178.30] ...took 11 ms
Searching for y.arin.net. A record at ns3.arin.net. [199.5.26.108] ...took 156 ms
Searching for 72.209.104.166.in-addr.arpa. PTR record at y.arin.net. [192.82.134.30]
...took 6 msSearching for y.arin.net. A record at k.gtld-servers.net. [192.52.178.30] ...took 11 ms
Searching for y.arin.net. A record at ns3.arin.net. [199.5.26.108] ...took 156 ms
Searching for ansan-d.hanyang.ac.kr. A record at I.ROOT-SERVERS.NET. [192.36.148.17]
...took 12 ms
Searching for ansan-d.hanyang.ac.kr. A record at b.dns.kr. [210.101.60.1] ...took 288 ms
Searching for ansan-d.hanyang.ac.kr. A record at hynetm.hanyang.ac.kr. [166.104.27.6] ...took 274 ms
Searching for 72.209.104.166.in-addr.arpa. PTR record at ansan-d.hanyang.ac.kr. [166.104.239.11]
Searching for ansan-d.hanyang.ac.kr. A record at b.dns.kr. [210.101.60.1] ...took 288 ms
Searching for ansan-d.hanyang.ac.kr. A record at hynetm.hanyang.ac.kr. [166.104.27.6] ...took 274 ms
Query timed out (interrupted after 2,002 milliseconds)
Retrying...Searching for 72.209.104.166.in-addr.arpa. PTR record at hynetm.hanyang.ac.kr. [166.104.27.6] ...took 281 ms
Nameserver hynetm.hanyang.ac.kr. reports: No such host 72.209.104.166.in-addr.arpa.
Total elapsed query time: 3,212 ms