How do you get an Authenticator code off a battlenet account?

To get an Authenticator code for your Battle.net account, you need to open the Battle.net Authenticator app on your mobile device. Once you launch the app, it will display a time-sensitive code that you can use to log in to your account. If you no longer have access to the Authenticator app, you can remove it by logging into your Battle.net account on a web browser and following the prompts to disable it, which may require answering security questions or receiving a verification email.