Yes, we send CP-Country-Code header with all requests which include ISO 3166-1 Alpha 2 format country code of visitor IP address. For example, you can fetch it in PHP using:
$ip = $_SERVER['HTTP_X_REAL_IP'];
$country = $_SERVER['HTTP_CP_COUNTRY_CODE'];
echo $ip; // 212.58.244.22
echo $country; // GB
