Just got one and didn't answer, no message.  Blocked.

And again.... Blocked but caller ID says Unavailable.

Called landline while we weren't home, no message left. CID says "None". Other reports online say phony police charity SCAM!

I live in San Diego, so I thought it might be someone I know, or a local business calling back.  Missed the call, so I returned the call. There was an immediate message that you can "press 2 to be taken off the list".  I have no idea who called, but I did go ahead and pressed "2".  I'll see what happens now.

Called but left no message