Searching for 253.147.105.162.in-addr.arpa. PTR record at B.ROOT-SERVERS.NET. [192.228.79.201]
...took 19 ms
Searching for 253.147.105.162.in-addr.arpa. PTR record at b.in-addr-servers.arpa. [199.253.183.183] ...took 15 ms
Searching for 253.147.105.162.in-addr.arpa. PTR record at b.in-addr-servers.arpa. [199.253.183.183] ...took 15 ms
Searching for x.arin.net. A record at B.ROOT-SERVERS.NET. [192.228.79.201]
...took 57 ms
Searching for x.arin.net. A record at i.gtld-servers.net. [192.43.172.30] ...took 6 ms
Searching for x.arin.net. A record at u.arin.net. [204.61.216.50] ...took 12 ms
Searching for 253.147.105.162.in-addr.arpa. PTR record at x.arin.net. [199.180.180.63]
...took 151 msSearching for x.arin.net. A record at i.gtld-servers.net. [192.43.172.30] ...took 6 ms
Searching for x.arin.net. A record at u.arin.net. [204.61.216.50] ...took 12 ms
Searching for ns.pku.edu.cn. A record at K.ROOT-SERVERS.NET. [193.0.14.129]
...took 12 ms
Searching for ns.pku.edu.cn. A record at ns.cernet.net. [202.112.0.44] ...took 222 ms
Searching for ns.pku.edu.cn. A record at ns.pku.edu.cn. [202.112.7.13]
Searching for ns.pku.edu.cn. A record at dns.pku.edu.cn. [162.105.129.26] ...took 189 ms
Searching for 253.147.105.162.in-addr.arpa. PTR record at ns.pku.edu.cn. [162.105.129.130]
...took 189 msSearching for ns.pku.edu.cn. A record at ns.cernet.net. [202.112.0.44] ...took 222 ms
Searching for ns.pku.edu.cn. A record at ns.pku.edu.cn. [202.112.7.13]
Query timed out (interrupted after 2,002 milliseconds)
Retrying...Searching for ns.pku.edu.cn. A record at dns.pku.edu.cn. [162.105.129.26] ...took 189 ms
Nameserver ns.pku.edu.cn. reports: No such host 253.147.105.162.in-addr.arpa.
Total elapsed query time: 2,874 ms