I took one for the team, and called the number back. It says this number is not in service. Feel free to call it back, will tell you the same thing. Definitely a junk number looking to sell you something.
I just took a call. He said this was an informative call about extending my car warranty. I told him I had no need. He was a little rude, asked why, etc. then hung up. shady soliciting.
I generally don't pick up numbers I don't recognize, but as I recently had surgery, doctor's offices, etc. seem to be calling and I can't seem to keep up fast enough with all the numbers. When I picked up, I got a recorded message that said something about a lawsuit...I just hung up without listening to the entire message.