Unable to find any PTR-records for the specified domain/ip :(
Log
+000
Resolving PTR record of '23.26.251.0'
+218
ERRNo PTR record availible DNS server 'ns4-07.azure-dns.info' raised an NotExistentDomain error, while beeing queried for PTR-records on domain '0.251.26.23.in-addr.arpa'.