Health insurance telemarketers from another country that use our landlines to solicit business. Tied in with our government health care system. How else would they know my medicaid is coming up for renewal?  And I received ten calls today from different area codes from across the country and they're all the same company. Some of the same numbers called twice today.  So far from these area codes...320,  507, 540, 605, 630, 702, 779, just today alone,  they are very persistent and if you're bored, mess with them. Ask them questions about them, like if they are married, or what the weather is like, then put the phone down or take it in the bathroom with you. Make them realize their job is a toilet.