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The same happens on my network, on better routers with a large range you are picking up neighbouring WiFi devices. They briefly appear then disappear. They don’t have your WiFi password so they can’t use your WiFi. Many WiFi devices phones, TVs etc that are WiFi capable will identify and sometimes notify that there are other WiFi networks available so they have to interrogate neighbouring WiFi’s and briefly appear on your network map. If it bothers you you can right click on the device when it shows, copy the MAC address and block it in the router, but any passing phone can do this |
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