Check your Apple ID device list to find where you’re signed in

If your device is missing, you can use Find My to find your device and take additional actions that can help you recover it and keep your data safe.

If you aren’t using your device anymore, or if you don’t recognize a listed device, you should remove it from the list. 

If you set up two-factor authentication for your Apple ID, removing a device will ensure that it can no longer display verification codes. It also won’t have access to iCloud and other Apple services, including Find My, until you sign in again with two-factor authentication. The device won’t reappear in the list unless you sign in again.

You can also permanently remove a device from your account page