The telephone 'caller ID' system has a defect that allows someone to disable caller ID on their own phone line and install an ultrasonic modem that will let the caller display any number on your phone they want to display. This will also work with some Voice over Internet Protocol (VoIP) services (web phones). Congress is full of incompetent a$$holes that want to fight about health care so much that they refuse to take the time to pass a law that requires phone companies to stop the criminals that are spoofing phone numbers. This is so common that it has a name. It is called 'phone phreaking' and it's been going on since the 1990s.

The heath care enrollment center. I called it back and it connects to them.

They claimed I had recently shown some kind of interest in purchasing health insurance. They wanted to sell me insurance. I have employer sponsored insurance.
I never do business with people who cold call me out of the blue.
At least they said they will remove my number from their list.

I s'pose I will find out cause I am not blocking their number....yet.

Apparently this guy is still calling people, unclear how he decided to call my number

I get these calls 7.01 am,to 9pm  like on a automatic. this is a scam artist.. do not respond the group has several numbers around the country just wanting info from anyone..  

ID says "Woodlake, CA"

Mis-read caller ID for a second and actually answered. It came on as a recording, "Hi my name is Brandy and I'm with something-something dot com. Can you hear me OK?"

I hung up right after that. Off to the Junk callers list.