How do I check an unknown device login on my Google account?
Answer
Open Google Account security on a trusted device, review recent security activity and devices, sign out unknown sessions, and change your password. Turn on 2-Step Verification if it is not already enabled.
Before you start: stop right away if…
- Do not share Google verification codes with anyone who contacts you about the unknown login.
Follow these steps
Open Google Security activity
On a trusted device, go to myaccount.google.com/security and open recent security activity or recent sign-in events.
You should see: You see recent sign-ins with device and approximate location details.
Review Your devices and sign out unknowns
Open Your devices or Manage all devices, select any unknown device, and sign it out.
You should see: The unfamiliar session is removed from the account.
Change your password
Change the Google password and choose the option to sign out other devices if offered.
You should see: Only sessions you approve can stay signed in.
Turn on or review 2-Step Verification
Enable 2-Step Verification or review current methods so a stolen password alone is not enough to sign in.
You should see: Stronger sign-in protection is active on the account.
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Extra tips
What to look for: Unknown device names, approximate locations or IP-based cities, sign-in timestamps, and whether the session is still active
Before you change anything: Use a computer or phone you already trust. Do not approve sign-in prompts you do not recognize. Have backup codes stored offline if you enable 2-Step Verification. Avoid links in unexpected security emails; open Google Account directly.