Searching for 34.19.121.42.in-addr.arpa. PTR record at M.ROOT-SERVERS.NET. [202.12.27.33]
...took 14 ms
Searching for 34.19.121.42.in-addr.arpa. PTR record at f.in-addr-servers.arpa. [193.0.9.1] ...took 12 ms
Searching for 34.19.121.42.in-addr.arpa. PTR record at f.in-addr-servers.arpa. [193.0.9.1] ...took 12 ms
Searching for rirns.arin.net. A record at M.ROOT-SERVERS.NET. [202.12.27.33]
...took 14 ms
Searching for rirns.arin.net. A record at l.gtld-servers.net. [192.41.162.30] ...took 11 ms
Searching for rirns.arin.net. A record at ns1.arin.net. [199.212.0.108] ...took 92 ms
Searching for 34.19.121.42.in-addr.arpa. PTR record at rirns.arin.net. [199.253.249.53]
...took 155 msSearching for rirns.arin.net. A record at l.gtld-servers.net. [192.41.162.30] ...took 11 ms
Searching for rirns.arin.net. A record at ns1.arin.net. [199.212.0.108] ...took 92 ms
Searching for ns4.aliyun.com. A record at I.ROOT-SERVERS.NET. [192.36.148.17]
...took 11 ms
Searching for ns4.aliyun.com. A record at e.gtld-servers.net. [192.12.94.30] ...took 24 ms
Searching for ns4.aliyun.com. A record at ns4.aliyun.com. [140.205.122.143] ...took 40 ms
Searching for 34.19.121.42.in-addr.arpa. PTR record at ns4.aliyun.com. [140.205.122.133]
...took 39 msSearching for ns4.aliyun.com. A record at e.gtld-servers.net. [192.12.94.30] ...took 24 ms
Searching for ns4.aliyun.com. A record at ns4.aliyun.com. [140.205.122.143] ...took 40 ms
Nameserver ns4.aliyun.com. reports: No such host 34.19.121.42.in-addr.arpa.
Total elapsed query time: 412 ms