Who is this unknown device on my Wi‑Fi?
Identify it using manufacturer, hostname, MAC and activity; phones may use private/random MAC addresses. Pause—not permanently block—while confirming with household members.
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6 answers found · last checked 17 August 2026
Identify it using manufacturer, hostname, MAC and activity; phones may use private/random MAC addresses. Pause—not permanently block—while confirming with household members.
Private/randomised MAC addressing can make the same phone appear with different identifiers, especially per SSID or after privacy-setting changes.
Paused devices can remain associated to Wi‑Fi while internet access is blocked by a profile or manual control. Resume only with authorised account-holder approval.
Guest networks are normally isolated for safety, so local discovery and device-to-device access may be blocked.
Slow Wi‑Fi is more often coverage, interference or traffic. Check unknown devices and security alerts, change credentials if compromise is credible, and update equipment.
Use a guest network where available; it limits access to trusted local devices. Use a strong unique main password.