I found this interesting per search bug
Phone Number 111-047-0400

Online research suggests that AT&T and other cell carriers have been using the 111 area code to indicate calls or text messages coming into a cell phone that were generated online with an instant messaging service.

In other words, it's most likely an unidentified person was on a computer, sending chat messages or voice calls to the target phone using an Internet chat program that has cross-platform capabilities to cell phones.

The chief culprit is Yahoo Instant Messenger
and the most commonly displayed number will be 111-047-0400.

The 111 Area Code is actually an Invalid number. It is not specific to the user of the instant messaging program and will not directly yield the identity of the person who was the source of the communication. Rather, it is only an indicator of a web to cell phone communication from an unknown party. No other information can be derived from these numbers.