I think this is what you looking for.
Its returning a hash ref. just deference it this way.
my $C0 = $data->{'s:Body'}->{'QueryXmlResponse'}->{'QueryXmlResult'}->
+{'queryResult'}->{'data'}->{'row'}->{'c0'}
print $C0;
Result
192.168.221.0
"We can't all be happy, we can't all be rich, we can't all be lucky – and it would be so much less fun if we were. There must be the dark background to show up the bright colours."
Jean Rhys (1890-1979)