No message left and don't know anyone from this number. Blocker the number.

Keep receiving calls from (925) 888-4521 but we don't recognize the number so we don't answer. Caller always hangs up after 3 rings. If they are depending on my curiosity, they will wait a long, long time between sales.

So annoying! Never answer the phone when the display shows: UNKNOWN NAME. When a 925 call is announced on my answering machine, I know that it is a bogus call since we live in that area code.

Called and I didn't answer - left hang up on my voicemail.

For me, this number came up as "California Call" on Caller ID. There was a recording I've heard multiple times before about an energy efficiency upgrade. It seems to be from a different number every time they call. I pressed 1 for an operator who garbled the pronunciation of her name, then wouldn't verify what it was. I asked the name of the company and she said, "I told you, Energy Upgrade Program," which doesn't sound like a company at all, though I didn't say that. Regardless, she was getting irritated and asked if I was interested in the program or not. I told her I just liked to know who I was talking to first. At that point she hung up.

Incidentally, calling back the number listed on Caller ID results in a recording: You have reached a number that has been disconnected or no longer in service.