Our last discussion ended up with this concept:

Trackable | Geofence | Start | End
----------|----------|-------|-------------
equipment:24 | geofence:7 | yesterday | today

But let's expand it to support any concept of geo region:

Trackable | Region | Start | End
----------|--------|-------|---------------
equipment:24 | geofence:7 | yesterday | today
equipment:24 | region:USA.NV | 2 days ago | null
equipment:24 | region:USA.UT | 2 days ago | yesterday
equipment:24 | geofence:8 | 7 days ago | 5 days ago