Reverse DNS Lookup for 17.255.240.78

Searching for 78.240.255.17.in-addr.arpa. PTR record at K.ROOT-SERVERS.NET. [193.0.14.129] ...took 40 ms
Searching for 78.240.255.17.in-addr.arpa. PTR record at e.in-addr-servers.arpa. [203.119.86.101] ...took 251 ms

Searching for d.ns.apple.com. A record at K.ROOT-SERVERS.NET. [193.0.14.129] ...took 40 ms
Searching for d.ns.apple.com. A record at d.gtld-servers.net. [192.31.80.30] ...took 23 ms
Searching for d.ns.apple.com. A record at c.ns.apple.com. [204.19.119.1] ...took 13 ms

Searching for 78.240.255.17.in-addr.arpa. PTR record at d.ns.apple.com. [204.26.57.1] ...took 15 ms

Nameserver d.ns.apple.com. reports: No such host 78.240.255.17.in-addr.arpa.

Total elapsed query time: 382 ms