Not sure who they are but I called back and pressed 1 to be removed from their calling list.  Must be some sort of telemarketing, survey, or something like that.

My wife and I both got calls from this number, same thing when called back about pressing 1 to be taken off list.  Not mention of who they were.  I actually got a voicemail but it just sounded like music playing in the car.

Received a call from this number. No message. When I tried to call back I was instructed to call my phone service's customer service. The number was not accepting calls.

Multiple calls, no message blocked

Got another call 24 hours after I had chosen to be removed from their call list.