You have the ability to set your own outbound caller ID: a) the default caller ID for all calls and b) on a per call basis.

If you log in on the web at http://service.ringcentral.com, and follow these instructions, you can set your default caller ID:

https://support.ringcentral.com/s/article/3614?language=en_US

Settings à Outbound Calls / Faxes à Caller ID

Change the Caller ID based on the feature it’s listed under.

We suggest you to set your default caller ID to be the main number of your primary location. That way if you call a colleague on their personal phone, they’ll know it’s work calling. This is merely a suggestion.

To set your caller ID per call, in the RingCentral App, bring up the dialpad by tapping “Phone” in the bottom toolbar:

Above the dialpad where you see From: <number>, tap there to bring up a list of choices, and choose the main number from the list, or whatever number you need.