use NetAddr::IP ();

my @hosts;

foreach (0..255) {
   my $net_addr      = NetAddr::IP->new("192.168.$_.0/24");
   my $net_broadcast = $net_addr->broadcast();

   push(@hosts, $net_addr->addr())
      while ++$net_addr != $net_broadcast;
}

print("$_$/")
   foreach @hosts;