have no idea who this is...unwanted text messages.... not identifying themselves

I got some strange text messages from this number too... Very odd.

Messages asking to be added on yahoo as averychick4. Won't identify themselves saying they have no serivce. They also are addressing me by name.

I got the same sort of text msg: "Hiii Todd. a.d.d. my ID on y.a.h.o.o msngr .. ID is chloegirly8"
Then another text that said: "sorry, I have no reception:)" I don't understand how they have my name.

I have recieved texts from 5043227396 and 3304835381 refering to me by name as well. The 504 number is the first time i was asked to add theyre yahoo id ( averychick4 ), when I asked who they were again the response was "oh no  I have no reception". As far as I know this is some kind of spam or scam, in any case I would not add them to your yahoo list...could quite possibly be someone trying to send you a virus, or even some kind of identity theft scam..