evolutiontime!!
anche con incrementale 
Codice PHP:
<?php
function iprange($start,$stop,$step=1)
{
$out=array();
list($start_1,$start_2,$start_3,$start_4)=explode(".",$start);
list($stop_1,$stop_2,$stop_3,$stop_4)=explode(".",$stop);
for ($a=$start_1; $a <= $stop_1; $a+=$step)
for ($b=$start_2; $b <= $stop_2; $b+=$step)
for ($c=$start_3; $c <= $stop_3; $c+=$step)
for ($d=$start_4; $d <= $stop_4; $d+=$step)
{
$out[]=$a.".".$b.".".$c.".".$d;
}
return $out;
}
echo "<pre>";
$res=iprange('192.168.0.5','192.168.100.229',10);
print_r($res);
?>