Who called from 8642109903

Legit callers will show a real name on your caller ID, and they will leave messages.  Answering the bogus calls usually gets your more of the same.

Received call moments ago on my business line. Dead air. Number now blocked.
That was easy.
Clowns.

Called 4/10, around 11am, left no message.  Called back and got message to press 1 to add my number to do not call list.

Not in my contacts.  Declined.  No voicemail.

They called while I was at work called it back said the number was not in service check the number and call again...didn't leave a voicemail but it's from South Carolina don't know what they want and can't block them or remove my number?