Multiple IPs to check - public DNS-resolvers will be used (Google and OpenDNS)
+086
Resolving PTR record of '13.107.21.200'
+096
ERRNo PTR record availible DNS server '8.8.4.4' raised an NotExistentDomain error, while beeing queried for PTR-records on domain '200.21.107.13.in-addr.arpa'.
+096
Resolving PTR record of '204.79.197.200'
+106
PTR-record resolved in a total of 8ms. Responding DNS-server: 8.8.8.8.
+106
Resolving PTR record of '2620:1ec:c11::200'
+126
ERRNo PTR record availible DNS server '8.8.8.8' raised an NotExistentDomain error, while beeing queried for PTR-records on domain '0.0.2.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.1.1.c.0.c.e.1.0.0.2.6.2.ip6.arpa'.