Got a call from this number a couple of days ago.  I never answer calls from unfamiliar numbers.

Tried calling the number back to see who it might be...I know, I know, never do this cause it just confirms that a live person is at this number...but it didn't even ring, just dead air.

I've "blacklisted" the number in my call-blocking device so my phone will never ring from this number again...that's partly the reason I don't mind calling these numbers back because once their blacklisted, I never have to worry about them again.