Got a lot of calls from this number. Finally answered it. They wanted to talk to the person responsible for the NIPSCO bill. Told they I didn't know what they were trying to sell but that I was not interested and not to call again.
This is a call that originates in Inwood, Indiana (don't worry if you can't find it, it's a speck on the map). I didn't answer and they left no message. From Pat's post above, I assume it's from a group that tries to tell you they can save you money on your NIPSCO (electric/gas) bill. I've had them before but never noticed the number, so I can't say that's what this is, but it sounds like it might be. Not sure what they offer because I never listened further.