Caller ID said that this call was from Salt Lake City, Utah.  Left no message.  Telemarketer?U

This number keeps calling and not leaving a message.

They kept calling me. Finally I took a call and asked who they were and they hung up.
Calling the number back led to a machine. I tracked them down to (801) 359-3697. If you  press 9 when requested to get to a company directory, the following options will get to a person or voice mail:
252.260.272,30,4,64
I did find others that worked, but went to the same people.
Most of the people I did get on the phone claimed to not work for Western Research, but were contractors. The guy at 64 did agree to put me on a do not call list.

Just called my unlisted do-not-call-list cell phone, no msg.  So annoying.

Clogged up my voicemail with silent 20 minute long voicemails.   Calls at all hours.