Recieved 2 calls today (Sunday March 18, 2012) from this number. The first one I didn't answer personally, but my answering machine did. The caller appeared to still be on the line, but didn't leave a message. Recieved another call from this number about an hour later and this time I answered it. Still no one spoke as I said hello and waited several times. I don't understand the purpose of calls like this, other than to be an occasional irritation.