I keep getting calls from this number and never a message is left to know who or what the call is about.

I didn't receive the call, then I searched online and found that the number is reported on 2014 as a telemarketing call, I was about to block the number but after listening to the voice mail I found it was my friend who worked for an IT department, and he has no idea why that number was shown as his desk number didn't match with the number above. Appears to be a outgoing number picked up by a IT related entity that located in Alexandria, VA.

This number called our cell phone at 4:50 a.m. while we were out of town celebrating an anniversary--woke us up out of a sound sleep.  Called the number and it just rang and rang and rang.  Are we being "tapped/located", who is this?  Let us know