Called with my first name at 8:30pm to Austin Tx representing Blue Cross/Blue Shield customer service. Asked if I was using my cell phone. I declined to answer questions.

Received a call from this number on my cell phone.  Rejected the call.  There was no name attached to the number.  6:49 pm MST.   Not wasting minutes on a number I don't recognize.

Missed a call from this #.  No message was left.

Answered the phone but they paused then hung up on me.

Called and when I answered, they immediately hung up.  I called them back.  I got an automated voice service saying that they are a company called the SQM Group, who supposedly does surveys and "is not a telemarketing company."
They gave me the option to enter my phone number to be removed from their call list.  I did it, but am now hoping that I didn't do something I might regret later.  I also blocked their number on my cellphone (I have an app that will kill blocks calls so it will seem like my number doesn't exist.  They can't even leave voicemails!).