Received a call from 312-940-4340 (shown on CID as "Chicago IL") around 1:30 PM on 10/20/15; caller hung up when answering machine picked up the call. We have been receiving many, many calls identified only as "Chicago IL", from a variety of different phone numbers: (312-248-7927; 312-667-2449; 312-248-7926). Annoying, to say the least, especially since they are probably all scam/spoof/sales calls.
I got that call too, I pressed 1 & got someone I could hardly understand (thick accent). They wanted me to consider changing electrical services, I said, "I thought this was Com Ed?" Reply: "No ma'am, we are..." Click. I hung up. So, they are leading customers to believe it is Com Ed, but they are not.
I get calls from this number three times a day. My answering machine picks up they hang up. Three times no message left. One time you could hear noises in the background sound foreign.