Searching for 121.37.15.185.in-addr.arpa. PTR record at B.ROOT-SERVERS.NET. [192.228.79.201]
...took 25 ms
Searching for 121.37.15.185.in-addr.arpa. PTR record at f.in-addr-servers.arpa. [193.0.9.1] ...took 12 ms
Searching for 121.37.15.185.in-addr.arpa. PTR record at f.in-addr-servers.arpa. [193.0.9.1] ...took 12 ms
Searching for ns3.afrinic.net. A record at K.ROOT-SERVERS.NET. [193.0.14.129]
...took 12 ms
Searching for ns3.afrinic.net. A record at g.gtld-servers.net. [192.42.93.30] ...took 5 ms
Searching for ns3.afrinic.net. A record at ns4.apnic.net. [202.12.31.53] ...took 16 ms
Searching for 121.37.15.185.in-addr.arpa. PTR record at ns3.afrinic.net. [204.61.216.100]
...took 11 msSearching for ns3.afrinic.net. A record at g.gtld-servers.net. [192.42.93.30] ...took 5 ms
Searching for ns3.afrinic.net. A record at ns4.apnic.net. [202.12.31.53] ...took 16 ms
Nameserver ns3.afrinic.net. reports: No such host 121.37.15.185.in-addr.arpa.
Total elapsed query time: 81 ms