Unable to find any PTR-records for the specified domain/ip :(
Log
+000
Resolving PTR record of '74.80.247.0'
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ERRNo PTR record availible DNS server 'ns-1866.awsdns-41.co.uk' raised an NotExistentDomain error, while beeing queried for PTR-records on domain '0.247.80.74.in-addr.arpa'.