Who called from 5205183005

Called the number back and recording said, "this account number is not valid".

Got a call from this number when I answered it, no-one spoke, and then it beeped and hung up.  Called it back and got the same recording "this  account is not valid" I'm guessing some kind of scam...blocked

Called April 27 and April 28 -- one minute apart each day.  Clearly robocall computer operated.  Then called again this morning.  Blocked before but the idiots keep calling.  At least I don't hear it ring.  The scammers originate mostly outside this country -- buy area codes and their computers then start calling random numbers.  Block if you can.

Called me twice today less than an hour apart, but no one answered, and it disconnected after a beep. Blocked them since it's obviously a robocall.