It's being worked on - there's a standard called STIR/SHAKEN which uses certs to verify calls. I worked on this on my last contract. It's pretty easy to impleme

It's being worked on - there's a standard called STIR/SHAKEN which uses certs to verify calls. I worked on this on my last contract. It's pretty easy to implement as a prototype - I've done it myself - but integrating it into the entire legacy phone network is another matter entirely. Here's an article about it: https://www.howtogeek.com/402141/how-phone-companies-are-finally-verifying-caller-id-numbers/ https://www.howtogeek.com/402141/how-phone-companies-are-fin...