i just got this call too, said free college locator service. i asked to remove from database as this is a minute cell phone (obama phone) they said sure no problem! we'll see.
I called the number back and they claimed that I requested information about college. I told them that they were wrong and they said they would stop calling me. Hope that helps.
They called me saying I requested information about going back to school, but they didn't know if I was out of highschool, in college, going back for trade, etc. I said GTFO and hope to not hear back.