[iMore.com]

Ever received a FaceTime call, dismissed the notification, and then forgot the email or phone number?
Not every email and phone number we communicate with is always stored in our address books. That's why features like call history are so important. If you use FaceTime audio and video regularly, you're already aware that people can use both emails and phone numbers, adding even more contact information to the mix. For this reason, you can easily access a history that only shows FaceTime activity, instead of it being combined with your regular call history.

Full story from the iMore Blog...