I received a call from this number for the first time this evening around 9pm CST. I didn't recognize the number so I didn't answer it. When I tried to call it back, just like everyone else said in above posts, it said the mailbox is full.
I answered the call and had a spanish message of 'if you want to listen to the message press (didn't catch the number). if you want to (couldn't remember the rest of the message but it was just another option)'
I waited to see if it would repeat the options, like most machines do, but the call just disconnected after a few seconds of waiting.
So I called back and got the 'this inbox is full' in english. Very strange, so I'm just ignoring it. :)