The number came up as Yellowstone National Park, So I answered out of curiosity. The person that answered after a 30 second delay identified herself as Blue Cross Blue shield and asked if i was ready to change insurance companies, I told her i only answered in order to see who was calling from Yellowstone. Before I could finish my sentence she hung up.
Got a call from this number. It showed up as Yellowstone National Park, so I answered. No one said anything. I called back and got a busy signal - which I didn't know even existed any more! I'm going to block this number.
Called at 7am!! Answered thinking something bad happened because who calls that early? Then told by a robot to press one to speak to someone. Someday I hope to call that person back when they are asleep.