If you believe an unauthorized user accessing your account, and would like help with disassociating or removing any devices that are logged into your account, you can reply to this thread and one of our Community Moderators can take a closer look.
Alternatively, you contact our support team directly for further assistance.
At this time, listeners cannot view or remove devices logged into their accounts manually.
In the meantime, you can upvote this idea by liking this request if you want to see this as a feature offered on Pandora.
Thanks everyone! 
