Received call on Wednesday, 9/8/2010. I was not able to get to phone fast enough so I tried returning call tons of times.
I only know that this phone number is billed out of Livonia, MI. I have no idea how anyone found out that it is UPS unless the subscribe to Intellius (it costs a lot to have an account with Intellius).
Received two calls within 5 minutes from (734) 523-1100, no message. When called back no answer after long period of time, also beware, when calling this number although it is ringing, the line is open and microphone is broadcasting (mic is on).