this area code-exchange has several last4s that find my outgoing message since mid-November, dead hang-up within 8 seconds. Generally:If I don't recognize the # on caller ID display, it goes to voice mail's outgoing message. Legitimate callers who expect a callback would leave a message, wouldn't they? If they were legitimate from their incoming reply, I could pick up the handset. But a quick hangup easy to dismiss. then mark for blacklist.