Gussi/calc-ips-isl.php

## calc-ips-isl.php
<?php
$total = 0;

foreach (file('http://www.rix.is/is-net.txt') as $net) {
    list(, $mask) = explode('/', $net);
    $total += pow(2, 32-$mask);
}

printf("%d ips allocated\n", $total);
	<?php
	$total = 0;

	foreach (file('http://www.rix.is/is-net.txt') as $net) {
	list(, $mask) = explode('/', $net);
	$total += pow(2, 32-$mask);
	}

	printf("%d ips allocated\n", $total);