Unable to find any PTR-records for the specified domain/ip :(
Log
+000
Resolving PTR record of '77.81.0.0'
+438
ERRNo PTR record availible DNS server 'ns-1841.awsdns-38.co.uk' raised an NotExistentDomain error, while beeing queried for PTR-records on domain '0.0.81.77.in-addr.arpa'.