Electric rate SCAM. Said he was calling from my local electric company, but admitted later he was not with my company. Hung up when I told him his rate was higher than I was paying. These people may be from a "real" electric provider but will use fraudulent tactics to get your account number so they can switch you to their company. Electric rates now, gas rates in the fall when heating season starts.
Someone called and did not leave a message. I called back. I heard this message (probably from my mobile phone service provider): "The call cannot be completed as dialed. Please, check the number and call again."
This is a spoofed number they call using different area codes for example 330-111-0000, 212-111-0000. From other posts, it appears to be an Asian scam involving "grants."