Create App ID, Bundle Identifier

Do I need a website to create BundleID, or can I use something else instead of.
Usually BundleID are the reverse of domain combined with the app name: com.domanName.appname
Should the domain have a valid website, or can I use some free domains that doesn’t exist?

Here is an excerpt from Apple’s App Distribution Guide:

The bundle ID string must be a uniform type identifier (UTI) that contains only alphanumeric characters (A-Z,a-z,0-9), hyphen (-), and period (.). The string should be in reverse-DNS format. For example, if your organization’s domain is and you create an app named Hello, you could assign the string com.Acme.Hello as your app’s bundle ID.

The bundle ID doesn’t have to be in reverse-DNS format. You just have to make sure it is unique.

Have fun!

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Thank you very much. I was already a litte disappointed.