Jun 24, 2012
This number is spoofed. As another said, it's the AT&T voicemail number. The caller isn't AT&T.
I got repeated calls at 1:30 AM Sunday morning from this number that began with a ring tone that simulates an old wall phone ringing, then a recorded message that my computer isn't functioning properly and that I must go to a URL that I didn't write down. I had to turn off the phone to stop repeated calls. I suspect that the URL is a web page that installs a worm or virus as soon as my browser loads the page.