I didn't have my cell phone with me but when I checked it there was a missed call from this number. No message was left. I tried to do a reverse phone lookup but of course you have to subscribe and pay a fee for that, but I was able to determine that this area code 312 is in downtown Chicago. I do not know anybody in Chicago so this probably is related to some type of scheme by telemarketers . However, I do have my cell phone registered on the donotcall list and I would suggest everyone do the same, the website is www.donotcall.gov.