Searching for 209.115.121.42.in-addr.arpa. PTR record at K.ROOT-SERVERS.NET. [193.0.14.129]
...took 11 ms
Searching for 209.115.121.42.in-addr.arpa. PTR record at e.in-addr-servers.arpa. [203.119.86.101] ...took 275 ms
Searching for 209.115.121.42.in-addr.arpa. PTR record at e.in-addr-servers.arpa. [203.119.86.101] ...took 275 ms
Searching for ns1.apnic.net. A record at M.ROOT-SERVERS.NET. [202.12.27.33]
...took 14 ms
Searching for ns1.apnic.net. A record at h.gtld-servers.net. [192.54.112.30] ...took 5 ms
Searching for ns1.apnic.net. A record at ns2.apnic.net. [203.119.95.53] ...took 5 ms
Searching for 209.115.121.42.in-addr.arpa. PTR record at ns1.apnic.net. [203.119.42.53]
...took 190 msSearching for ns1.apnic.net. A record at h.gtld-servers.net. [192.54.112.30] ...took 5 ms
Searching for ns1.apnic.net. A record at ns2.apnic.net. [203.119.95.53] ...took 5 ms
Searching for ns5.aliyun.com. A record at B.ROOT-SERVERS.NET. [192.228.79.201]
...took 19 ms
Searching for ns5.aliyun.com. A record at c.gtld-servers.net. [192.26.92.30] ...took 25 ms
Searching for ns5.aliyun.com. A record at ns4.aliyun.com. [140.205.122.133] ...took 48 ms
Searching for 209.115.121.42.in-addr.arpa. PTR record at ns5.aliyun.com. [140.205.122.153]
...took 43 msSearching for ns5.aliyun.com. A record at c.gtld-servers.net. [192.26.92.30] ...took 25 ms
Searching for ns5.aliyun.com. A record at ns4.aliyun.com. [140.205.122.133] ...took 48 ms
Nameserver ns5.aliyun.com. reports: No such host 209.115.121.42.in-addr.arpa.
Total elapsed query time: 635 ms