Call from this number and it's happened before. I don't know anyone in Chicago, and they've not left a voice message.

Got a call to my cell phone from this number on. I didn't recognize the number and didn't answer; they did not leave a voicemail either.  My cell phone is registered on the Do Not Call list, for a lot of good that does anyway.  I never give out my cell phone number, except to immediate family and close friends, as I have a land-line phone.  The weird thing is I've gotten 3 calls over the last few days, all from different numbers in the Chicago area.  I don't know anyone in Chicago.