Caller ID shows only "San Francisco, CA", so I let it go to voice mail but they left no msg. It's close to another number (only last 2 digits changed) that has been calling me and others on here, so I suspect it is one of many consecutive numbers these telemarketers use. I am just adding them to my blocked list.
This number says "Dental Care" on my Caller I.D. It is a ROBO Call and it is illegal to ROBO Call without the express consent of you. Report to F.T.C. like <justAcigar> suggested. Don't hesitate or put it off, the more complaints the more action.