An unfamiliar entry in Google’s device list deserves review, but the displayed name alone is not a complete identification. Inspect its sessions, activity time, and sign-in status before deciding what happened.
Open the device details
- Go to Google Account Security & sign-in.
- Under Your devices, select Manage all devices.
- Open the unfamiliar device or session.
- Compare the details with your current and recently used devices.
The list includes devices currently signed in and devices used in recent weeks. A Signed out label means the listed session is not currently authenticated; it can remain as recent history.
Check ordinary explanations
A new browser, an app authorization, a private browser session, or re-entering your password can create a separate session. A factory-reset device may also still appear in the history.
The activity time can reflect background synchronization, not just the last moment you touched the device. A location may be a nearby place rather than an exact address. Use all these details together instead of treating one unusual label as decisive.
Sign out access you cannot account for
Select the relevant session and use Sign out. If the device name appears in multiple sessions and you want access removed from it, inspect and sign out every relevant session. Identically named entries can represent one device or more than one.
If you cannot establish that an active session is yours, signing it out is a reasonable protective step. Keep your own working verification methods available so the review does not lock you out.
Investigate a possible compromise
If the entry is genuinely unfamiliar or accompanies unauthorized changes, follow Google’s compromised-account guidance. Change the password from a trusted device and review recovery information, passkeys, 2-Step Verification, linked apps, and Gmail settings.
Signing out a session does not erase files already downloaded or remove every authorization. For a work or school account, share the non-sensitive event details with the administrator. Do not publish device identifiers or account-recovery information to ask strangers whether the device belongs to an attacker.
Official references
Reviewed against Google’s official guidance on October 27, 2026. Available options and screen labels can vary by account, device, region, and organization policy.