When setting up different FTP, mail, MySQL programs, etc., you need to specify the server hostname. You can check what server your account is hosted on in different ways.
1. Log into cPanel by typing into a browser http://yourdomain.tld/cpanel:
In this example, the hostname is server126.web-hosting.com
2. You can look up the hostname in Hosting Welcome Guide >> Hosting package details section:
NOTE: Alternatively, to set up an application, you can use your account IP address as a hostname.