Reverse DNS Lookup for 209.123.162.100

Searching for 100.162.123.209.in-addr.arpa. PTR record at K.ROOT-SERVERS.NET. [193.0.14.129] ...took 39 ms
Searching for 100.162.123.209.in-addr.arpa. PTR record at a.in-addr-servers.arpa. [199.180.182.53] ...took 90 ms

Searching for x.arin.net. A record at K.ROOT-SERVERS.NET. [193.0.14.129] ...took 40 ms
Searching for x.arin.net. A record at k.gtld-servers.net. [192.52.178.30] ...took 13 ms
Searching for x.arin.net. A record at u.arin.net. [204.61.216.50] ...took 14 ms

Searching for 100.162.123.209.in-addr.arpa. PTR record at x.arin.net. [199.180.180.63] ...took 90 ms

Searching for ns2.nac.net. A record at K.ROOT-SERVERS.NET. [193.0.14.129] ...took 40 ms
Searching for ns2.nac.net. A record at i.gtld-servers.net. [192.43.172.30] ...took 19 ms
Searching for ns2.nac.net. A record at ns2.nac.net. [207.99.0.2] ...took 87 ms

Searching for 100.162.123.209.in-addr.arpa. PTR record at ns2.nac.net. [207.99.0.42] ...took 234 ms
SERVFAIL
Searching for 100.162.123.209.in-addr.arpa. PTR record at ns1.nac.net. [207.99.0.1] ...took 539 ms
SERVFAIL
Searching for 100.162.123.209.in-addr.arpa. PTR record at ns2.nac.net. [207.99.0.42] ...took 87 ms
SERVFAIL
Searching for 100.162.123.209.in-addr.arpa. PTR record at ns1.nac.net. [207.99.0.1] ...took 87 ms
SERVFAIL

None of the nameservers responded correctly.

Total elapsed query time: 1,379 ms