Using Custom PythonAnywhere Subdomains

The "Your own domain" option on our "Add a new web app" dialog is normally used to specify a domain that you own -- something like www.yourdomain.com.

However, if you don't own a domain, or don't want to use a fully custom one, you can also use a custom subdomain of pythonanywhere.com. It must of the format

something-yourusername.pythonanywhere.com

...or, on our EU system:

something-yourusername.eu.pythonanywhere.com

...where the "something" can be any combination of numbers and letters, and the "yourusername" is your normal PythonAnywhere username.