Who called from 9702121888

These people call and leave no messages.
When you try to get in touch with them they refuse to identift themselves
and the company they are working for.

How do they get your number??

Received unknown call then 5 min later a call from this number, did not reconize it so did not pick up...

I just received a phone call from 970 212 1888 and telling me that this call is a personal matter.

Got a couple of calls from this number. Called back last week and was asked who I wanted to talk to. I asked what company it was. They said that this number routes calls for various companies so didn't know which one called me. Not sure what is going on here but the call must be computer generated since it only rings once.