Left no message and tried to append international dialing in front of their number to make it seem important. When you call them back, it is the electric company idiots trying to "reduce your electric bill". Scam. Avoid. Ignore. Block.

Another one to block..

These idiots called 3-days in a row.

Robot says, you may be eligible for lower costs electric bills.

No option button to remove from their caller list.

Caller ID reads, Oak Lawn.

all it said was press one to have this call blocked on the do not call list

Press 1 to add your number to the "it is a live one" list we sell to other scammers.
Press 2 to yell at somebody who may not understand you.
Press 3 to verify a human answered your phone.
Press 4 if you enjoy getting unwanted phone calls.  We aim to please.
Press 5 if you have a dial-type phone instead of a pushbutton phone.
Press 6 if you have that many fingers on one hand.
Press 7 if you want us to call you at 7 AM ... or, some other, inconvenient time.
Press 8 if you like the sound of that tone
Press 9 if you are still on the line.
Press 0 to hear this message again