I got a voicemail from this number too -- definitely suspect since my power comes from a San Diego provider that doesn't use a Los Angeles phone line ...
I recieved the same robo voicemail, derived from the number 714-587-5742, when I googled the 714 number i found this "SAVE FROM SOLAR". http://savefromsolar.com/
Got a call from 2135149625 with CID "LOCAL" yesterday evening around dinnertime. I didn't answer. Caller left a VM requesting a callback at 2135197278. Appears to be an electricity rate scammer. Beware.
its a scammer message saying they want to help to reduce the electric bill. If government agencies does not know who is the caller is and their location , and or arrest them, then don't blame them to harass and scam people