This number called not too long ago, and I let it go on the machine. Whoever it was left a message saying "hello, are you there..." over and over for about a minute. Listening back to it, it didn't sound like an actual person, but a recording.
Received a call from this number on 08 JAN 2014. A man with a bad accent wanted me to do something with my computer. After many angry words from me, he could not come close to convincing me. In particular, he told me that Norton and McAfee did not know about these viruses, so I demanded to know how he knew. After a little more doubletalk from the caller, I told him I didn't believe anything he said, and hung up.