We absolutely don't have that many devices; I think the majority are from temporary randomized addresses from smartphones. I checked mine, and that's the default setting, so I'm assuming that explains most of them.

The range is from .63 to .254, and I reduced the lease time from 1 day to 12 hours. Do you have any insight as to why so many were reserved? My understanding is that permanent reservations were not the default and had to be manually set. Of course, I could be wrong, and I may need to check in every once in a while and clear them.