This number calls repeatedly and daily and often uses an ID such as 'Electric Dept" ... and they let they hang up when the answering machine picks up ... and leave the dial tone as the message. Ticks me off!
First it was a robocall. Then a person answered when I pushed "5." Her name was Lisa Lopez and wanted to offer me a discount to my electrical bill. When I asked what company she worked for, she replied "30some." When I asked her who signed her check, she said, "None of my business" and hung up on me.