Unable to find any PTR-records for the specified domain/ip :(
Log
+000
Resolving PTR record of '2403:5700::'
+165
ERRNo PTR record availible DNS server 'ns1.apnic.net' raised an NotExistentDomain error, while beeing queried for PTR-records on domain '0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.7.5.3.0.4.2.ip6.arpa'.