Synced Safari History Between Apple Devices

I am aware Apple devices can sync information such as Safari history through the iCloud and need to know whether there is a way that I can tell exactly which device was doing the browsing?

I have had a look at the History.db from an iMac and cannot see definitively a column that would tell me if it was the mac that made the entry or another Apple device.

Has anyone looked at this before or know how I can find the answer I am looking for?