Sounded like a robo call. I picked up but no one answered. I then heard a short electronic noise and then the call disconnected.

Called, but did not leave message.  Must be spam.

Received the call. I knew it was a bogus number from the actual number and the ID but, I do have to check in case it actually is a number. I of course was right the first time. The noise was basically static and then a hangup. Thankfully I have VoIP and I added it to my black list so, I won't get a call from them any longer.

Didn't answer. They didn't leave message.

Answered and after a few seconds strange sound, then hung up! As of now, you are Blocked!