They've called six times in the last seven days. They don't leave messages, so I have no idea who they are, nor do I want to. My Panasonic phone has a "call block" button on it. I think I'll use it. Now. (I can block up to 99 phone numbers. The list is filling rather quickly.)
They've been calling repeatedly the last few days. If you answer they hang up. If you let it go to message, they wait and wait and wait without saying anything and then hang up.
I just received a call from this number, Last week one from 507-206-5573. I never answer thses calls since i screen my calls. They don't leave a message.