Who called from 3123005700

Just received a call from 312-300-5700 and I don't answer phone calls that I don't recognize.  Everyone needs to stop answering calls that they don't recognize the number and don't call them back, that only tells them that your phone number is a working number

Calls several times a week. No message

Got missed call from this number. I called back and the recorded voice said "Verde Energy USA".

I just got a missed call from that number too, as well as one yesterday.  Again, no message was left.

Number called but hung up after saying Hello.  Caller ID comes up as Unavailable