Searching for 72.209.104.166.in-addr.arpa. PTR record at B.ROOT-SERVERS.NET. [192.228.79.201]
...took 25 ms
Searching for 72.209.104.166.in-addr.arpa. PTR record at e.in-addr-servers.arpa. [203.119.86.101] ...took 264 ms
Searching for 72.209.104.166.in-addr.arpa. PTR record at hynetm.hanyang.ac.kr. [166.104.27.6] ...took 276 ms
Searching for 72.209.104.166.in-addr.arpa. PTR record at e.in-addr-servers.arpa. [203.119.86.101] ...took 264 ms
Searching for y.arin.net. A record at M.ROOT-SERVERS.NET. [202.12.27.33]
...took 14 ms
Searching for y.arin.net. A record at m.gtld-servers.net. [192.55.83.30] ...took 12 ms
Searching for y.arin.net. A record at ns3.arin.net. [199.5.26.108] ...took 155 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 m.gtld-servers.net. [192.55.83.30] ...took 12 ms
Searching for y.arin.net. A record at ns3.arin.net. [199.5.26.108] ...took 155 ms
Searching for ansan-d.hanyang.ac.kr. A record at A.ROOT-SERVERS.NET. [198.41.0.4]
...took 6 ms
Searching for ansan-d.hanyang.ac.kr. A record at c.dns.kr. [210.101.61.1] ...took 333 ms
Searching for ansan-d.hanyang.ac.kr. A record at hynetm.hanyang.ac.kr. [166.104.27.6] ...took 276 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 c.dns.kr. [210.101.61.1] ...took 333 ms
Searching for ansan-d.hanyang.ac.kr. A record at hynetm.hanyang.ac.kr. [166.104.27.6] ...took 276 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 276 ms
Nameserver hynetm.hanyang.ac.kr. reports: No such host 72.209.104.166.in-addr.arpa.
Total elapsed query time: 3,369 ms