Who called from 4191150000

This caller claimed he was my grandson.  Unfortunately for him, I do not have a grandson.  This is undoubtedly a scammer.  BEWARE!

Has called twicw within an hour and does not leave a message

Phone blocker says not a valid number??

Said there were calling about keeping my AEP electric rate from going up. I said, "Put me on your do not call list." She said, this is not a sales call." I asked", Then what kind of call is this?" She, " It's to make sure your rate doesn't go up. I'll wait while you go and get you last bill for me." She's still waiting!!!! Blocked at my end now