Who called from 8642109903

Received a call that's not in my contacts, I declined the call, and adding the number to block list.

Got a call from this number, not in my contacts, declined to answer.  Thankfully no message left.

Did not answer no in my contacts.

Received call not in my contacts did not leave message

Received call from that number, answered and immediately hung up, then returned call and got the message that the numb6I called doesn't exist.