A good rule of thumb is that if you are sure you are on the no call list, yet get phone calls from an unknown numbers (regardless of what they claim), it's most likely a scam. I've been monitoring all the "oddball" numbers that I get calls from (I am on the no call list), and over 90% of them are SCAMS. Don't pick up unless you want to waste their time. ;)
Found this number on my caller ID. I received a few "blocked" calls, so I dialed *69. It rang to a voicemail that said "(male voice, 45+ years old) This is Randy, leave me a message." I'm worried he could be dangerous. If I get murdered I hope the cops find this.
Same issue. Callback was hung up on. *69 was hung up on, so I reported this to the FCC at http://www.fcc.gov/complaints. They don't do anything, but maybe they'll annoy this clown a little. Otherwise, I'm giving out his number in all my emails and searches today.