RAYVN uses multiple local phone numbers to send notifications by text/SMS and phone calls. If you want your phone to identify the notifications as "RAYVN", use this QR code with your phone. You will then be asked to add RAYVN as a contact to your phone. If you do this, future notifications from RAYVN will be identified as RAYVN, not just an unknown number.
To read more about this, click here.