Yes, you can use your website without a domain name.
We provide you a temporary URL in your welcome email, which can be used to view your site when your domain name is not working.

Example: http://ipaddress/~cpanelusername/

Of course, this is only an example. You must replace ipaddress with your server's IP, replace cpanelusername with your actual cPanel username, and replace domain.com with your actual domain name.

Note: If you forget the trailing forward slash (at the end) you will be redirected to a different URL.