With this script, you can get a list of Slave zones with their certain Master servers. You can download it from here.
AUTH_ID should be your API user ID and AUTH_PASS should be the password of your API user.
// Auth ID and Password
define("AUTH_ID", 0);
define("AUTH_PASS", "xxx");
When you are ready with your configuration, you can run the script with the following command:
php list-slave-zones-with-master-servers.php
The script will output a list with Slave zones and their master servers.
If your API user ID or Password is incorrect, you will get an error message.