I had a similiar experience about 18 months ago and no one hacked my network nor were they connect via ethernet. Using ur Xfi app on ur smart phone go to each device and scroll to the bottom and choose device details. You should be able to figure out what type of device it is, ie notebook, smarphone, storage device, etc. Make a note of them. Strangely, in my instance these were all devices that were connected at one time to our network, but with an old router. I was able to reach a person knowledgable in xfinity networks. I was told that my router remembers each and every device ever connected to the network. My thing was that these devices were all connected to an older router that xfinity replaced. I was taught how to login to my router admin tools with a login and password. I found all the device in there and removed them. They never showed up again. I'm a novice at networks and the tech was a huge help to me. I'm sure there are things that have changed since this occured. But I recommend that you call technical support and insist that you speak to a network specialist on the American side of support and get asking for a supervisor until you get it. Good Luck
... View more
