Called a few months ago and I placed it on my blocked list. Somehow managed to call again today. Blocked again. We'll see how long that lasts. Never leaves a message.
Don't know who this is, but they keep calling every day in the morning. If they're a collection agency for Comcast, that's hilarious because I haven't had Comcast service since the 1990s at another address. I now have them blocked, but they always seem to call back a few days later from another 312 number.