PHP ASN to Ranges

<?php
/**
 * Get CIDRs from Robtex, per ASN
 */

// Change /as#.html, use https://asn.cymru.com/ with IP annouced by ASN
$data = file_get_contents('https://www.robtex.com/as/as62.html');

preg_match_all('/[0-9]{1,3}.[0-9]{1,3}.[0-9]{1,3}.[0-9]{1,3}\/[0-9]{2}/', $data, $matches);

foreach($matches[0] as $match)
{
    echo $match . PHP_EOL;
}