I just got a call from this phone number.

Did not answer - no ID, just number

They hung up before leaving a message on my answering machine.  I need a bit more intelligence on this one to determine whether to block or not.  I know sometimes places like AmVets have people calling from their own numbers who do not leave messages to see if you have anything to donate like old clothes and they are legit.  But there is no way to tell when they don't leave a message.  I almost never pick up a number I don't recognize on caller ID.

Got 'em again.  Might as well block.

This number keeps calling. I don't answer.