This number seems to be associated by various reports with a group or person whose purposes seem bizarre or perhaps downright nefarious. They seem to be operating at the fringes of the law. One report lists it as a debt collector using a variety of 720-763-xxxx digits. Others claim silence or very abusive treatment with no apparent reason or direction.
This # has called me repeatedly, never leaves a message so no idea who they are but if they were legit I would imagine they would leave a voice mail since they call me so often. Pretty sure they are some kind of scammers.
I just called this # to see who it was, this is Trans World Systems, they are a notoriously horrid and unethical collections agency. Never answer calls from them!!