We too keep getting calls at our business. It seems like no one is on the other line when we pick up, but I think there is. The waiting and hang-up seems intentional. I wonder if they are tracking our number to see when someone is actually there. No identification on caller i.d.
Got 4 calls at our business today from this number. Nobody is on the other end. Tried calling it back to yell at them, but it rang twice and the line went dead.
Just got a call from this number, but there was no one there. I just called this number back, and it turned out to be a marketing call from Hess Energy Small Business division, and is associated with an 866 number. When asked why they were calling a number on the Do Not Call list, they said they would update their records, and then immediately went into their sales pitch.