CLI:
curl "https://macaddresslookup.info/lookup/?mac=08-00-27-00-08-CA"

PHP:
<?php 

$mac = "08-00-27-00-08-CA";

$curl = curl_init("https://macaddresslookup.info/lookup/?mac=$mac");
@curl_setopt($curl, CURLOPT_RETURNTRANSFER ,true);
$resp = curl_exec($curl);
curl_close($curl);

echo "$resp";
?>