The Federal Trade Commission FTC handles illegal robot calls and the donotcall violations.  Not the FCC.

Sounds like attorneys looking to sue.

Got call; didn't pick up.

I looked this number up on this site first, called the number back, and the first thing you get is a recorded message that says "If you would like to be removed from the list of the number that called you, press 1 now", which I did.  Another message, after you press 1, says it may take up to 48 hours to be removed from this list.  If that doesn't work, I'll report them to the FCC.

I blocked their number as soon as I saw "Xarelto Claims" on my Caller ID