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.
MAC vendor; private address; first seen; traffic; profile.
Security escalation for persistent unknown/high-risk traffic.
Show the technical detail
On a managed Wi-Fi plan
Use eero/Plume/Calix device inventory and rename verified devices.
On another provider's router
ISP apps vary.
What to be careful of
Do not accuse a neighbour or disclose household browsing.
Where this comes from: Official · see the original source ↗ · Draft—technical review · checked 17 August 2026