Call about eletirc bill - I live in NJ and they are calling from Delaware

In the past week now, I've been getting a call a day on my cell phone regarding saving on my electric bill. Twice I've answered out of curiousity and in the hopes of telling a human to stop calling but it's always just a recording. I'm wondering if answering has somehow alerted them that they've calling a working number.  Just did not answer a call from this 302 number while I looked it up on this site. In the past two days, the calls I did answer were from 702-705-5324 and 702-520-2413

Just got a call from this number and there was no message. I'm signed up on the do not call list and I live no were near Delaware. I've had this number for more then 7years even though we travel A LOT.

I get 10 calls a day from these [***]. If they think that I'm going to think positively of them after these antics they are sadly mistaken.

did not pick up, no message left