Does not leave a message.  If you call this number back, you get a recording stating the number is not in service.

I was waiting for a call about auto insurance when this guy called. Said he had a cream formula specified by my Dr.  Said my health insurance would cover it. He asked where my pain was, wanted my DOB, then he wanted to know if I had Medicare, Medicaid, or who. So how did he know I was covered but not who was covering?  We parted at that point.

Always giggling Emily - every call, whether at work on on my cell (now blocked) says 'Hello?  giggle. sorry, I was having trouble with my headset"  then proceeds with her schpiel.  Even after I literally scream NO! into the receiver

Spam call from Julie, home security professionals recorded spam

Did not answer; no message left.  Called back and a recording said that the number was no longer in service.  But then, strangely, gave an option to be removed from their list.  Definitely SPAM.