What kind of invalid number you want to block? Do you have any specific pattern? Unknown caller can be a valid number which is not in your contact. Could you please elaborate the kind or type of number? You can check the idea portal where these feature request are made.
An example will be following which is a feature request to block 5 digit number
https://ideas.ringcentral.com/ideas/ENTCOM-I-78
"What kind of invalid number you want to block " I want to block those which are invalid duuuuuh, When caller ID is blank, or is unknown caller or unknown number I have no interest. that is zero interest in even allowing the number to ring me. This system seem to only block by specific number.. Once again, I want to block any invalid or unknown number.
Hi @jason-hirsh, this call blocking feature is not available with RingCentral. Feel free to add a feature request in our Ideas Portal at https://ideas.ringcentral.com/.
thank you for your response.. Just another reason to ditch this inferior service