Just received a call from this number as well. Unknown, no meesage, no information out there on the internet. No data returned from "WhitePages" search either.
They called and left no message so I call them back two time. I got two different people (man and woman) and both times they only spoke Spanish. The first call the guy just kept asking for a Mexican guy, and when I only spoke in English he finally gave up and hung up on me. The second time I called the lady asked the for the same guy but before she hung up I told her that if they call again I would report them to the police, she seemed to learn a little English.
My phone is listed under a false name. They must have seen that name on their caller ID and thought I was someone different and spoke Spanish.
My guess is that they are some type of collection agency looking for someone and calling people that match that name in my case. I'm not Mexican, nor do I have a Spanish name, I just have my number listed as such, it was cheaper than paying for an unpublished number to try to keep people from bugging me.