5,000 contacts can be uploaded at a time.
If you have an Excel spreadsheet with up to 5000 contacts, that can be uploaded.
If you have an Excel spreadsheet with more than 5000 contacts, it needs to be split into two or more files and uploaded separately.
The total number of contacts is unlimited.
Please note that the uploader will not accept any html tags or text such as <html> etc in any of the contact columns.