Received a call on my cellphone today from this number.  No message was left. I have no idea who they are...

Just now we received a phone call from 317-599-4207, as indicated on our caller ID box.  I answered "Hello?" several times.  No one said anything, human or machine.  Then the phone call just clicked and hung up.  I checked the Internet and as indicated by website http://3175994207.phone.searchwww.com/ it may belong to MCI Worldcom Communications Inc. in Indianapolis, Indiana.  If this is correct, MCI should not call people randomly and irritate them at 8:30 at night.

Finally answered this number.  It was a company that was doing a telephone survey for a doctor visit I'd taken my son to a few weeks ago (specialist).

I have received various calls from this number. I have even answered it, but no one responses back to me. Reverse Look Up says it is a land line number in Indianapolis , but I have never been there and I doubt it is my credit card company that is based in Indianapolis.