Searching for 15.123.6.117.in-addr.arpa. PTR record at C.ROOT-SERVERS.NET. [192.33.4.12]
...took 12 ms
Searching for 15.123.6.117.in-addr.arpa. PTR record at c.in-addr-servers.arpa. [196.216.169.10] ...took 166 ms
Searching for 15.123.6.117.in-addr.arpa. PTR record at c.in-addr-servers.arpa. [196.216.169.10] ...took 166 ms
Searching for ns2.apnic.net. A record at K.ROOT-SERVERS.NET. [193.0.14.129]
...took 34 ms
Searching for ns2.apnic.net. A record at c.gtld-servers.net. [192.26.92.30] ...took 23 ms
Searching for ns2.apnic.net. A record at ns4.apnic.net. [202.12.31.53] ...took 16 ms
Searching for 15.123.6.117.in-addr.arpa. PTR record at ns2.apnic.net. [203.119.95.53]
...took 132 msSearching for ns2.apnic.net. A record at c.gtld-servers.net. [192.26.92.30] ...took 23 ms
Searching for ns2.apnic.net. A record at ns4.apnic.net. [202.12.31.53] ...took 16 ms
Searching for dns1.viettel.com.vn. A record at K.ROOT-SERVERS.NET. [193.0.14.129]
...took 34 ms
Searching for dns1.viettel.com.vn. A record at g.dns-servers.vn. [204.61.216.115] ...took 14 ms
Searching for dns1.viettel.com.vn. A record at dns1.vietel.com.vn. [203.113.131.1] ...took 176 ms
Searching for 15.123.6.117.in-addr.arpa. PTR record at dns1.viettel.com.vn. [203.113.131.1]
...took 176 msSearching for dns1.viettel.com.vn. A record at g.dns-servers.vn. [204.61.216.115] ...took 14 ms
Searching for dns1.viettel.com.vn. A record at dns1.vietel.com.vn. [203.113.131.1] ...took 176 ms
Nameserver dns1.viettel.com.vn. reports: No such host 15.123.6.117.in-addr.arpa.
Total elapsed query time: 783 ms