Who called from 9254587639

No caller ID.  I didn’t answer, and the caller did not go through the prompts to bypass my call screening device.

1-925-458-7639 called and left no message. Caller ID said Glacer M.

Answered and accidentally cut-off speaker before he could finish his sentence which sounded like it a question.  He didn't call back.  Likely a robo sales pitch since no "Hello" or other human-like opening greeting.

Called the number back. Got the disconnect intercept message. So it is a spoofed number.

No one there when I answered, just a pause, a noise and disconnect.
Robocall from a fake number.
Scum/Scam