Searching for 121.171.101.38.in-addr.arpa. PTR record at K.ROOT-SERVERS.NET. [193.0.14.129]
...took 40 ms
Searching for 121.171.101.38.in-addr.arpa. PTR record at f.in-addr-servers.arpa. [193.0.9.1] ...took 12 ms
Searching for 121.171.101.38.in-addr.arpa. PTR record at f.in-addr-servers.arpa. [193.0.9.1] ...took 12 ms
Searching for auth2.dns.cogentco.com. A record at K.ROOT-SERVERS.NET. [193.0.14.129]
...took 40 ms
Searching for auth2.dns.cogentco.com. A record at b.gtld-servers.net. [192.33.14.30] ...took 42 ms
Searching for auth2.dns.cogentco.com. A record at auth1.dns.cogentco.com. [66.28.0.14] ...took 11 ms
Searching for 121.171.101.38.in-addr.arpa. PTR record at auth2.dns.cogentco.com. [66.28.0.30]
...took 11 msSearching for auth2.dns.cogentco.com. A record at b.gtld-servers.net. [192.33.14.30] ...took 42 ms
Searching for auth2.dns.cogentco.com. A record at auth1.dns.cogentco.com. [66.28.0.14] ...took 11 ms
Nameserver auth2.dns.cogentco.com. reports: No such host 121.171.101.38.in-addr.arpa.
Total elapsed query time: 156 ms