IGS is affiliated with Dominion East OH gas--I got a call from this number 2/4/13 asking to speak to the person who pays the Columbia Gas Co bill--it's a cell number in Ohio
Received a call listed on caller ID as "Massillon, OH". "Message" on machine sounded like a pocket dial. I'm an IGS customer, but never get calls from them, and don't need to!
This number calls repeatedly, despite our telling them we are not interested. It just comes through with the Caller ID of "Massillon, OH". They are beyond persistent -- they are harassing.