If you want to be 100% sure, find the "View all properties" button in the left sidebar of the contact and search for "Original drill-down 1". The value in there is the value that you're looking for and uniquely identifying these contacts.
Hope this helps!
Karsten Köhler HubSpot Freelancer | RevOps & CRM Consultant | Community Hall of Famer
If you want to be 100% sure, find the "View all properties" button in the left sidebar of the contact and search for "Original drill-down 1". The value in there is the value that you're looking for and uniquely identifying these contacts.
Hope this helps!
Karsten Köhler HubSpot Freelancer | RevOps & CRM Consultant | Community Hall of Famer