Searching for 4.0.51.143.in-addr.arpa. PTR record at I.ROOT-SERVERS.NET. [192.36.148.17]
...took 11 ms
Searching for 4.0.51.143.in-addr.arpa. PTR record at d.in-addr-servers.arpa. [200.10.60.53] ...took 170 ms
Searching for 4.0.51.143.in-addr.arpa. PTR record at d.in-addr-servers.arpa. [200.10.60.53] ...took 170 ms
Searching for y.arin.net. A record at B.ROOT-SERVERS.NET. [192.228.79.201]
...took 75 ms
Searching for y.arin.net. A record at a.gtld-servers.net. [192.5.6.30] ...took 23 ms
Searching for y.arin.net. A record at u.arin.net. [204.61.216.50] ...took 11 ms
Searching for 4.0.51.143.in-addr.arpa. PTR record at y.arin.net. [192.82.134.30]
...took 13 msSearching for y.arin.net. A record at a.gtld-servers.net. [192.5.6.30] ...took 23 ms
Searching for y.arin.net. A record at u.arin.net. [204.61.216.50] ...took 11 ms
Nameserver y.arin.net. reports: No such host 4.0.51.143.in-addr.arpa.
Total elapsed query time: 303 ms