I just got a call - saw notes from enterprise - i rented a car from them on monday. missed call - no message

I just received the same here in Alabama at 8:21pm on June 03, 2008

Received a call on my cell phone from 636-200-0115 at 6:14pm ET tonight.  No message.

rented from enterprise as well last week.  survey on customer service?

Got a call from this number 6/3/08 5:20pm. They asked for me by name. Is sounded like my sister-in-law so I thought I would mess with her.
  I Said, "No, you cannot speak with him". The lady responded "Ok, sorry." and hung up.
  At that time I realized it wasn't sis, so I checked here. Not sure how they got my name and number, but I do not appreciate unsolicited calls, especially on my cell phone!
(If I find out Sprint/Nextel sold me out, I'll quit them in a heartbeat!)