At this time, SmarterTrack does not list the ID numbers anywhere in the interface. I will change this thread to an idea to allow other users to vote on your suggestion of adding the IDs to the management interface.

Thanks Andrew.  One particular thing that would make it useful to see the ID number in the interface is that sometimes you might have the same department names in different brands.  For example, "Support Department" might exist within several different brands.  Showing the ID number somewhere in the interface would help differentiate them when choosing the right ID number for an API call.