The Contacts → All Contacts page provides an overview of every email address that has ever been part of your contact lists-both current and historical. This allows you to keep track of all contacts associated with your account in one place.
Please note that this global list is read-only. While you can view the contacts, you cannot use this list to send campaigns. Its purpose is to give you a complete picture of your account’s contact history.
If you want to see the total number of contacts ever used in your account, this information is available on your dashboard, which displays the exact contact count.
Additionally, if you need a more detailed record, you can easily export the entire contact list as a CSV file for further analysis or reporting.