Look up device macs against this look up table

[mrchrisadams]

It turns out there's a huge list of registered identifiers whewn working with mac addresses, that you can use to work out which company the come from:

http://standards.ieee.org/develop/regauth/oui/

The list is upodated every 24 hours, and can at least give some clue to what kinds of devices are on the network.

The entries look a bit like this in the text file:

  00-1F-F3   (hex)      Apple, Inc
  001FF3     (base 16)      Apple, Inc
                1 Infinite Loop
                Cupertino CA 94086
                UNITED STATES

With some text massaging, they could easily be part of a lookup system.