If you have multiple OpenPhone numbers in the app, you can choose which number to call from.
From the mobile app, tap your account icon from the upper left corner of the app. Then select the number under "Your numbers". That number will show up on the recipient's caller ID.
The person you call doesn't need to have the app installed, they'll receive a call just like they normally would. The same applies to text messages.
Calling out from the web or desktop app and have more than one number on your OpenPhone account? Select the number you want to use under "Inboxes":
