This is one of many calls from different numbers that I get ALL DAY LONG. It starts with a robot saying "Our records indicate that there are several listings on Google Maps for your business." or some such thing. It's a scam where they have you look up your biz, and funny enough, THEY can't seem to find your business, even though you can see it easily on Google right in front of your face. They try to transfer you to a hard-sell "manager", but I got off the phone before that happened. I've been around this particular block many times. They use some generic name for their alleged company. The Do Not Call List means absolutely nothing to these people.
Yes, that's how they do it, given it saves them money and make you pay for the call when you call back. Do not every bother to call back if they hang up like that.
Robodialer called and no one one the line. Called back, silence for 20sec an then it hung up on me. Said "mapping department" on caller id. Who knows... Sick of the google listings calls.