Interestingly it doesn’t look like it’s included the main ones, ip_address and registration_ip_address from the users table.
There are a couple of others too when I do a data explorer field search.
screened_emails.ip_addressscreened_urls.ip_addressuser_histories.ip_addressuser_ip_address_histories.ip_address
Not all of them have any records in on my test site, but probably worth a check of your own tables to make sure they’re empty for you too.