These calls are such a very big nuisance. They could regulate them and get rid of them since most of them occur over VoIP you would then make the VoIP company responsible for people who are Robo calling. We need to have a class action suit against all the Internet VoIP providers.
These calls now spoof other peoples phone numbers so it comes up with the name and number of somebody unrelated but generally in your same area code.
Most of these calls are from overseas, mainly India. They spoof US numbers.