Who called from 7204771519

I get this number calling me every day but leaves no message.

I got 2 calls from this number today. It's getting annoying..

I keep getting calls from this number. They call non-stop and never leave a message.

I have been getting daily calls from this number. I decided to answer it and the guy automatically says wrong number and hangs up!

This same number has called me at the same time for the last 3 days.  I've answered it twice, and both times it's the same thing:  a clicking noise, followed by a lot of background noise, then they hang up on me.  The first time they called I missed it, so they called back later that day and it was the same thing, I answer they hang up...WHY?!