Who called from 2162459121

Don't know who it is

Called it back and it says disconnected, so I am wondering if someone is calling from the phone or if it is a fax phone?  No message was left.

Called my cell phone twice, left no message. Called back and no one answered.

Called me twice. Tried to call back on two diff phones, both times was told number not in service. I believe its a number generated from an app to prank people.

called me 12 times in one day!!