How can we block a particular number we want?
Blocking a number
Check this:
https://forums.developers.ringcentral.com/questions/8932/can-we-block-a-contact-number.html
https://support.ringcentral.com/s/article/7251?language=en_US
Super Admin can block a number applied to all extensions
Reply
Enter your E-mail address. We'll send you an e-mail with instructions to reset your password.