Searching for 2.107.49.121.in-addr.arpa. PTR record at M.ROOT-SERVERS.NET. [202.12.27.33]
...took 13 ms
Searching for 2.107.49.121.in-addr.arpa. PTR record at f.in-addr-servers.arpa. [193.0.9.1] ...took 11 ms
Searching for 2.107.49.121.in-addr.arpa. PTR record at dns5.edu.cn. [166.111.8.30] ...took 187 ms
REFUSED
Searching for 2.107.49.121.in-addr.arpa. PTR record at DNS.UESTC.EDU.CN. [202.112.14.151] ...took 273 ms
REFUSED
Searching for 2.107.49.121.in-addr.arpa. PTR record at CDNET52.UESTC.EDU.CN. [202.112.14.161] ...took 271 ms
REFUSED
Searching for 2.107.49.121.in-addr.arpa. PTR record at DNS.UESTC.EDU.CN. [202.112.14.151] ...took 272 ms
REFUSED
Searching for 2.107.49.121.in-addr.arpa. PTR record at f.in-addr-servers.arpa. [193.0.9.1] ...took 11 ms
Searching for apnic.authdns.ripe.net. A record at I.ROOT-SERVERS.NET. [192.36.148.17]
...took 12 ms
Searching for apnic.authdns.ripe.net. A record at j.gtld-servers.net. [192.48.79.30] ...took 12 ms
Searching for apnic.authdns.ripe.net. A record at manus.authdns.ripe.net. [193.0.9.7] ...took 11 ms
Searching for 2.107.49.121.in-addr.arpa. PTR record at apnic.authdns.ripe.net. [193.0.9.9]
...took 12 msSearching for apnic.authdns.ripe.net. A record at j.gtld-servers.net. [192.48.79.30] ...took 12 ms
Searching for apnic.authdns.ripe.net. A record at manus.authdns.ripe.net. [193.0.9.7] ...took 11 ms
Searching for dns5.edu.cn. A record at D.ROOT-SERVERS.NET. [199.7.91.13]
...took 11 ms
Searching for dns5.edu.cn. A record at e.dns.cn. [203.119.29.1] ...took 23 ms
Searching for dns5.edu.cn. A record at dns.edu.cn. [202.38.109.35] ...took 186 ms
Searching for 2.107.49.121.in-addr.arpa. PTR record at dns5.edu.cn. [101.4.126.67]
Searching for dns5.edu.cn. A record at e.dns.cn. [203.119.29.1] ...took 23 ms
Searching for dns5.edu.cn. A record at dns.edu.cn. [202.38.109.35] ...took 186 ms
Query timed out (interrupted after 2,002 milliseconds)
Retrying...Searching for 2.107.49.121.in-addr.arpa. PTR record at dns5.edu.cn. [166.111.8.30] ...took 187 ms
Searching for CDNET52.UESTC.EDU.CN. A record at K.ROOT-SERVERS.NET. [193.0.14.129]
...took 12 ms
Searching for CDNET52.UESTC.EDU.CN. A record at ns.cernet.net. [202.112.0.44] ...took 221 ms
Searching for CDNET52.UESTC.EDU.CN. A record at dns.uestc.edu.cn. [202.112.14.151] ...took 272 ms
Searching for 2.107.49.121.in-addr.arpa. PTR record at CDNET52.UESTC.EDU.CN. [202.112.14.161]
...took 272 msSearching for CDNET52.UESTC.EDU.CN. A record at ns.cernet.net. [202.112.0.44] ...took 221 ms
Searching for CDNET52.UESTC.EDU.CN. A record at dns.uestc.edu.cn. [202.112.14.151] ...took 272 ms
REFUSED
Searching for 2.107.49.121.in-addr.arpa. PTR record at DNS.UESTC.EDU.CN. [202.112.14.151] ...took 273 ms
REFUSED
Searching for 2.107.49.121.in-addr.arpa. PTR record at CDNET52.UESTC.EDU.CN. [202.112.14.161] ...took 271 ms
REFUSED
Searching for 2.107.49.121.in-addr.arpa. PTR record at DNS.UESTC.EDU.CN. [202.112.14.151] ...took 272 ms
REFUSED
None of the nameservers responded correctly.
Total elapsed query time: 4,073 ms