caller ID "UNAVAILABLE" left no message. I will see if they call back before blocking.

I had the same experience as reported by AB.  No caller ID and no message left.

Don't know, don't care. No one is named at birth   Boston     M   A,  No company is called  Boston    M   A.   Unless you're in an office and must answer the phone.. Don't.      I assume the Call type should be listed as  Prank