These scumbags are spoofing Caller ID, using a VOIP robo dial program.
Sometimes, the spoofed phone numbers are not valid.
Sometimes, the spoofed phone numbers are legitimate. When this happens, the real owners of the spoofed numbers become victimized by hundreds of angry people like us.
Being on the DNC list doesn't help.
Having an unlisted number doesn't help.
A computer is doing all of the work.
Consumer Services for interest rates reduction on Credit Cards. I spoke to some foreigner from the middle east or west Asia that gave his name as Lincoln. He hung up on me. Called the number back, it is a disconnected number.