This showed up on my Call Blocker, because I've blocked the area code.

Dead air after answering, no one there.

Called left no message. Thanks for your above reports. I'll be blocking this number too!

Called my home phone, registered on the DNC, at 5:01 PST.  My caller ID states "Unavailable".  I picked up the phone before it could go to my answering machine, and then just hung it up.  I work from home, and I get 8 to 9, sometimes more, telemarketer/scam calls every day.  My call blockers is full on my Panasonic.  I may need to upgrade to a different phone to get capability to block more calls.  I'm thankful for this site - wealth of information!  Thanks all!

My call blocker has a 250 number limit. These crooks seem to change numbers frequently, and so I find it's usually safe to delete the oldest numbers in order to make room for more. I keep records of which numbers I've deleted so I can identify any I may want to keep blocked. Try it. It's an ongoing chore. We  all need to start pressuring the Congress to do something meaningful and enforceable about this. I suggest that fines, say $10 per call,  be imposed upon the telephone carriers themselves.  That would shut this nonsense down in a hurry!