008-000-1201

My boyfriend has verizon wireless, and on his bill, it states that he has sent text messages to this number.  I am thinking that it is IM texts on his mobile or from his computer, but I am not positive about these numbers because other people seem to be getting weird numbers like these on their phone bills.  And he says that he has not used any IM's on his mobile phone.  But I don't understand how it can show up on the phone bill if you do not use it????  is he lying to me????