Note: The error code is the last 3 digits of the code you see in the error notification. For example, if you see the error notification Call failed (code: 2202404), the error code is 404.
If you are receiving Zoom Phone error 480: The number you dialed is temporarily unavailable. Please try again later., this means that the number you have dialed could not be reached for reasons such as the other party being unavailable or declining the call.
Try to call again later.