Searching for 111.157.86.211.in-addr.arpa. PTR record at K.ROOT-SERVERS.NET. [193.0.14.129]
...took 11 ms
Searching for 111.157.86.211.in-addr.arpa. PTR record at e.in-addr-servers.arpa. [203.119.86.101] ...took 251 ms
Searching for 111.157.86.211.in-addr.arpa. PTR record at e.in-addr-servers.arpa. [203.119.86.101] ...took 251 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 d.gtld-servers.net. [192.31.80.30] ...took 25 ms
Searching for ns1.apnic.net. A record at ns4.apnic.net. [202.12.31.53] ...took 16 ms
Searching for 111.157.86.211.in-addr.arpa. PTR record at ns1.apnic.net. [203.119.42.53]
...took 190 msSearching for ns1.apnic.net. A record at d.gtld-servers.net. [192.31.80.30] ...took 25 ms
Searching for ns1.apnic.net. A record at ns4.apnic.net. [202.12.31.53] ...took 16 ms
Searching for dns5.edu.cn. A record at B.ROOT-SERVERS.NET. [192.228.79.201]
...took 25 ms
Searching for dns5.edu.cn. A record at a.dns.cn. [203.119.25.1] ...took 246 ms
Searching for 111.157.86.211.in-addr.arpa. PTR record at dns5.edu.cn. [166.111.8.30]
...took 187 msSearching for dns5.edu.cn. A record at a.dns.cn. [203.119.25.1] ...took 246 ms
Searching for ns2.cernet.net. A record at B.ROOT-SERVERS.NET. [192.228.79.201]
...took 63 ms
Searching for ns2.cernet.net. A record at f.gtld-servers.net. [192.35.51.30] ...took 6 ms
Searching for ns2.cernet.net. A record at dns4.cernet.net. [202.112.0.13] ...took 221 ms
Searching for dns5.edu.cn. A record at ns2.cernet.net. [103.137.60.203]
...took 187 msSearching for ns2.cernet.net. A record at f.gtld-servers.net. [192.35.51.30] ...took 6 ms
Searching for ns2.cernet.net. A record at dns4.cernet.net. [202.112.0.13] ...took 221 ms
Searching for NS.USTC.EDU.CN. A record at I.ROOT-SERVERS.NET. [192.36.148.17]
...took 12 ms
Searching for NS.USTC.EDU.CN. A record at c.dns.cn. [203.119.27.1] ...took 27 ms
Searching for NS.USTC.EDU.CN. A record at dns.edu.cn. [202.38.109.35] ...took 186 ms
Searching for NS.USTC.EDU.CN. A record at mx.ustc.edu.cn. [202.38.64.56] ...took 212 ms
Searching for 111.157.86.211.in-addr.arpa. PTR record at NS.USTC.EDU.CN. [202.38.64.1]
...took 211 msSearching for NS.USTC.EDU.CN. A record at c.dns.cn. [203.119.27.1] ...took 27 ms
Searching for NS.USTC.EDU.CN. A record at dns.edu.cn. [202.38.109.35] ...took 186 ms
Searching for NS.USTC.EDU.CN. A record at mx.ustc.edu.cn. [202.38.64.56] ...took 212 ms
Nameserver NS.USTC.EDU.CN. reports: No such host 111.157.86.211.in-addr.arpa.
Total elapsed query time: 2,139 ms