Enterprise Technology Services has enabled this setting for all UCSB Zoom accounts:

Mask phone number in the participant list

Phone numbers of users dialing in to a meeting will be masked in the participant list. For example 888****666.

The purpose of this is to prevent others from harvesting telephone numbers of those who choose to dial into Zoom Meetings and is in line with the Zoom account configuration of other UC campuses.

Please let us know if you have any questions or concerns regarding this or any other Zoom settings, you can do so via ithelp.ucsb.edu.