Who called from 2128010036

I'm getting the same thing, it's been happening for a couple months now.

When I answer no one is on the other line and the number isn't recongnized if you try to call back.

the same thing began happening to me today. they called twice within an hour and when i answered, it sounded like a girl was murmuring on the other end. the line subsequently went dead.

what is the origin and purpose of this?

I received a call yesterday and today from this number on my cell phone. I did not pick up, and no message was left. I want the calls to stop.

Same problem as those reported above. This number is calling two and three times a day right now.

I just started getting calls from them.  I haven't picked up but they never leave a message.  This has to be the 5th time they have called!!