#!/usr/bin/perl

use Net::DNS

$res = Net::DNS::Resolver->new;

for($c = 0; $c <= 255; $c++) {
 for($d = 0; $d <= 255; $d++) {
  print "81.86.$c.$d" unless $res->query("81.86.$c.$d", "PTR");
 }
}

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In reply to Re: Better way to check reverse DNS entries by ctilmes
in thread Better way to check reverse DNS entries by !unlike

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