Searching for 172.64.138.212.in-addr.arpa. PTR record at M.ROOT-SERVERS.NET. [202.12.27.33] 
...took 14 ms
Searching for 172.64.138.212.in-addr.arpa. PTR record at a.in-addr-servers.arpa. [199.180.182.53] ...took 93 ms
Searching for 172.64.138.212.in-addr.arpa. PTR record at a.in-addr-servers.arpa. [199.180.182.53] ...took 93 ms
Searching for ns3.afrinic.net. A record at M.ROOT-SERVERS.NET. [202.12.27.33] 
...took 14 ms
Searching for ns3.afrinic.net. A record at m.gtld-servers.net. [192.55.83.30] ...took 12 ms
Searching for ns3.afrinic.net. A record at ns2.afrinic.net. [196.216.168.10] ...took 249 ms
Searching for 172.64.138.212.in-addr.arpa. PTR record at ns3.afrinic.net. [204.61.216.100] 
...took 7 msSearching for ns3.afrinic.net. A record at m.gtld-servers.net. [192.55.83.30] ...took 12 ms
Searching for ns3.afrinic.net. A record at ns2.afrinic.net. [196.216.168.10] ...took 249 ms
Searching for ns1.isu.net.sa. A record at M.ROOT-SERVERS.NET. [202.12.27.33] 
...took 14 ms
Searching for ns1.isu.net.sa. A record at i1.dns.sa. [212.138.118.118] ...took 96 ms
Searching for ns1.isu.net.sa. A record at ns2.isu.net.sa. [212.138.72.5] ...took 74 ms
Searching for 172.64.138.212.in-addr.arpa. PTR record at ns1.isu.net.sa. [212.26.18.3] 
...took 99 msSearching for ns1.isu.net.sa. A record at i1.dns.sa. [212.138.118.118] ...took 96 ms
Searching for ns1.isu.net.sa. A record at ns2.isu.net.sa. [212.138.72.5] ...took 74 ms
Nameserver ns1.isu.net.sa. reports: No such host 172.64.138.212.in-addr.arpa.
Total elapsed query time: 672 ms
