Xfinity

Hello. It would be my pleasure to assist you with this. Please see below : 

Devices

In the Devices section, you can view all devices that are currently or were previously connected to your home network, as well as devices that have WiFi access currently paused.

Identifying Devices

When a device first connects to your home network, the default name of the device, which is either the manufacturer-set name (i.e., hostname or MAC address) or the one you gave your device when you first set it up, will be displayed. Devices connected to the public Xfinity WiFi hotspot, xfinitywifi, will not appear in your Devices list; hotspots are separate from your personal home network.

If you do not recognize a device:

• Go to the Devices section. Select the device from the list, then select Device Details to see the manufacturer.
• If the device is connected to your home network, there should be a green dot indicating that it's online, which may also help with identifying what device it is.
• Access the hostname or MAC address in your device's settings. If the default name displayed is a long string of numbers and letters, it's likely the MAC address

For a more detailed explanation, please visit : https://www.xfinity.com/support/articles/personalize-customize-hnetwork-xfi