Who called from 7867861245

This number has called me 3 times so far today. I get a recording that just says goodbye and then hangs up. They are calling my office number and really getting on my last nerve!!

Question is... how are they getting your name and phone number if you're not listed anywhere?  Some database hacked?

Got 2 calls within 10 mins; lots of background noise for a second and then disconnected.  Blocked it.

I received a call this morning from the number 786-681-0425 mentioning about my computer has virus and running slow I am skeptical about the call. It is scary! What should we do?