Unable to find any PTR-records for the specified domain/ip :(
Log
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Resolving PTR record of '68.237.192.0'
+337
ERRNo PTR record availible DNS server 'ns6.verizon.net' raised an NotExistentDomain error, while beeing queried for PTR-records on domain '0.192.237.68.in-addr.arpa'.