Net::DNS::Resolver - IP address to DNS name?

[Rush, Thomas]

I have been trying to convert an IP address into it's DNS name using DNS::Resolver without much joy. I have used DNS::Resolver to convert DNS names to IP addresses successfully.   OS: WIN32 Perl V 5.8.2   The return value fails with the following error message: query failed: NXDOMAIN Any thoughts on where I'm going wrong? Thank you for any help.     #!/user/bin/perl   my $res = Net::DNS::Resolver->new;   my $ipaddress ="10.80.0.2";   my $query = $res->search($ipaddress); if ($query) {     foreach my $rr ($query->answer) {         next unless $rr->type eq "PTR";         print "Server name is ",$rr->ptrdname, "\n";     } } else {       warn "query failed: ", $res->errorstring, "\n"; }   #End code   ------------------------------------------------------------ The information contained in or attached to this email is intended only for the use of the individual or entity to which it is addressed. If you are not the intended recipient, or a person responsible for delivering it to the intended recipient, you are not authorised to and must not disclose, copy, distribute, or retain this message or any part of it. It may contain information which is confidential and/or covered by legal professional or other privilege (or other rules or laws with similar effect in jurisdictions outside England and Wales). The views expressed in this email are not necessarily the views of Centrica plc, and the company, its directors, officers or employees make no representation or accept any liability for its accuracy or completeness unless expressly stated to the contrary.