I --think-- that I had this number blocked and it seems to have gotten through again. I can not answer the other questions because I let most unidentified number to to voice mail and then search the number. Also very telling when no message is left.
3-8-16 got call from this number 312-235-1137 -- caller id just shows number and no name.. no msg left. i believe it to be scammer or telemarketing. don't answer