Searching for 96.226.78.115.in-addr.arpa. PTR record at I.ROOT-SERVERS.NET. [192.36.148.17]
...took 12 ms
Searching for 96.226.78.115.in-addr.arpa. PTR record at e.in-addr-servers.arpa. [203.119.86.101] ...took 275 ms
SERVFAIL
Searching for 96.226.78.115.in-addr.arpa. PTR record at e.in-addr-servers.arpa. [203.119.86.101] ...took 275 ms
Searching for ns2.apnic.net. A record at I.ROOT-SERVERS.NET. [192.36.148.17]
...took 12 ms
Searching for ns2.apnic.net. A record at a.gtld-servers.net. [192.5.6.30] ...took 23 ms
Searching for ns2.apnic.net. A record at ns1.apnic.net. [203.119.42.53] ...took 191 ms
Searching for 96.226.78.115.in-addr.arpa. PTR record at ns2.apnic.net. [203.119.95.53]
...took 5 msSearching for ns2.apnic.net. A record at a.gtld-servers.net. [192.5.6.30] ...took 23 ms
Searching for ns2.apnic.net. A record at ns1.apnic.net. [203.119.42.53] ...took 191 ms
Searching for dns1.viettel.com.vn. A record at B.ROOT-SERVERS.NET. [192.228.79.201]
...took 69 ms
Searching for dns1.viettel.com.vn. A record at c.dns-servers.vn. [203.119.38.105] ...took 309 ms
Searching for dns1.viettel.com.vn. A record at dns1.vietel.com.vn. [203.113.131.1] ...took 329 ms
Searching for 96.226.78.115.in-addr.arpa. PTR record at dns1.viettel.com.vn. [203.113.131.1]
...took 345 msSearching for dns1.viettel.com.vn. A record at c.dns-servers.vn. [203.119.38.105] ...took 309 ms
Searching for dns1.viettel.com.vn. A record at dns1.vietel.com.vn. [203.113.131.1] ...took 329 ms
SERVFAIL
Searching for dns2.viettel.com.vn. A record at D.ROOT-SERVERS.NET. [199.7.91.13]
...took 12 ms
Searching for dns2.viettel.com.vn. A record at a.dns-servers.vn. [194.0.1.18] ...took 9 ms
Searching for dns2.viettel.com.vn. A record at dns1.vietel.com.vn. [203.113.131.1] ...took 339 ms
Searching for 96.226.78.115.in-addr.arpa. PTR record at dns2.viettel.com.vn. [203.113.188.2]
...took 298 msSearching for dns2.viettel.com.vn. A record at a.dns-servers.vn. [194.0.1.18] ...took 9 ms
Searching for dns2.viettel.com.vn. A record at dns1.vietel.com.vn. [203.113.131.1] ...took 339 ms
Nameserver dns2.viettel.com.vn. reports: No such host 96.226.78.115.in-addr.arpa.
Total elapsed query time: 2,228 ms