Who called from 6084920696

I got a call on my cell from this number, said hello, and other end male said hello and then a hangup.

I asked how they obtained my phone number, which created silence and no response to my repeated hello, hello.

Missed a call from this number an hour ago, called it back just now and it is a robotic automated message with no identification of the company

Missed a call from this number an hour ago, called it back just now and it is a robotic automated message with no identification of the company

Missed a call from this number. Called back and got a busy signal.