The Ring Central Phone would show the Call From number during the call.
This was a great feature for when you would leave a voicemail you can provide the correct callback number. especially if you have multiple lines.
however the phone app is being discontinued. I would like this feature moved into the new Ring Central App.
Currently the App will sow the Call From number before the call starts (so you can change to a different number if you need). but as soon as you make the call it disappears.