If you can get the MAC address of a device, you can find out how old it is. MAC addresses are unique identification numbers for the devices in a network and it appears that you can use them to get an idea of the age of devices. This is useful if you are trying to gather more data about what is on your network and how any other tool can be used for good or bad. The data is all in a freely accessible CSV file on Github.
: Use MAC addresses to find out how old network devices are