On your computer, go to Gmail. Enter your Google Account email or phone number and password. If information is already filled in and you have to sign in to a different account, click Use another account. If you get a page that describes Gmail instead of the sign-in page, at the top right of the page, click Sign in.

Go to the Google sign-in page and click Need help? below the login field. Click Find my account. Select either Enter your recovery email address or Enter your recovery phone number, then type your name and check off the box next to I'm not a robot.

Go to your Google Account. On the left navigation panel, select Security . On the Your devices panel, select Manage all devices. You'll see devices where you're currently signed in to your Google Account or have been in the last few weeks.