DNC listed for 9 years and counting.  This number showed up on my caller id @1:28pm EST 11/28, 2:56pm 11/26, 3:07pm 11/16.  Call back drops into voice mail ID'ing themselves as "Corporate office" with a full mailbox..

Since going 100% wireless in 2012. Never answer calls from unknown numbers!!

That's where Talking caller id on Bluetoothed Panasonic phone helps a lot.

Any missed calls are Google'd first, if they hit like this number, then they are added to my cell phone robo group/block list. Any subsequent calls from those blocked numbers(without ringing), will quickly get dumped into voice mail hell. Which answers, "user has not set up voice mail", hangs up, and doesn't cost me air time :-).

Just the number listed on the caller ID. When it called me (on work #), it hung up when I answered.

call a lot caller unknown callback voicemail says mailbox full!!

Claimed to be from an energy conservation company.  Hung up on me when I started asking questions.

Caller ID said Cell phone.

Called but did not leave a message.  No caller ID.
I am on the Federal Govt. do not call list.