Recording from Waltham MA on how I'm now qualified to reduce my electricity bill.

Received a call from this telephone number. No message was left. Anonymous callback reached the generic telemarketing greeting (Press 9 to be placed on the Do Not Call list).

We got a call from this number today at 2:50 pm. The caller ID was WALTHAM MA, and it was blocked by our call blocker. This is apparently a new number for these lowlife coprolites, but due to other such calls our call blocker blocks all calls with this ID. I highly recommend such a device to avoid these nuisances.

called my work after hours. Caller ID says GO GREEN.

Had to answer b/c they are sneaky and use a local phone number so I must answer.  I would love if an MIT Grad could invent something that sends a ZAP to the human on the other end just like a Invisible Fence like a Dog (if it is a human calling) If it is a robocall, then send a zap to blow out their server.
If the CIA, NSA etc can figure out all the crap that they do, why can't they fix THE most annoying issue?