I have activated the feature that blocks "anonymous" calls, but this does not block "name not available calls. Although the two are not technically the same, in reality I consider them both as a nusance and want them both blocked.
I have my list of blocke numbers filled all the time. It is impossible to keep up with the slugs that make these unsolicited calls--they keep changing numbers. The Federal Government passed an act in 2019 requiring phone service providers to assist with blocking unwanted robo-calls. I don't see that comcast has done anything to remedy the situation.
Please, Please block all "name not available" calls now.