Searching for 177.31.121.42.in-addr.arpa. PTR record at B.ROOT-SERVERS.NET. [192.228.79.201]
...took 25 ms
Searching for 177.31.121.42.in-addr.arpa. PTR record at c.in-addr-servers.arpa. [196.216.169.10] ...took 169 ms
Searching for 177.31.121.42.in-addr.arpa. PTR record at c.in-addr-servers.arpa. [196.216.169.10] ...took 169 ms
Searching for ns1.apnic.net. A record at B.ROOT-SERVERS.NET. [192.228.79.201]
...took 63 ms
Searching for ns1.apnic.net. A record at h.gtld-servers.net. [192.54.112.30] ...took 6 ms
Searching for ns1.apnic.net. A record at apnic.authdns.ripe.net. [193.0.9.9] ...took 11 ms
Searching for 177.31.121.42.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 6 ms
Searching for ns1.apnic.net. A record at apnic.authdns.ripe.net. [193.0.9.9] ...took 11 ms
Searching for ns4.aliyun.com. A record at M.ROOT-SERVERS.NET. [202.12.27.33]
...took 13 ms
Searching for ns4.aliyun.com. A record at a.gtld-servers.net. [192.5.6.30] ...took 24 ms
Searching for ns4.aliyun.com. A record at ns4.aliyun.com. [140.205.122.133] ...took 38 ms
Searching for 177.31.121.42.in-addr.arpa. PTR record at ns4.aliyun.com. [140.205.122.133]
...took 39 msSearching for ns4.aliyun.com. A record at a.gtld-servers.net. [192.5.6.30] ...took 24 ms
Searching for ns4.aliyun.com. A record at ns4.aliyun.com. [140.205.122.133] ...took 38 ms
Nameserver ns4.aliyun.com. reports: No such host 177.31.121.42.in-addr.arpa.
Total elapsed query time: 578 ms