this is the number that shows up for LA county Child support Services. they use this line as a reminder of any court appointments/account information. it's not a scam.
They called me, and said I had to send in my child support payment. I don't have any kids, nor have I ever lived in Los Angeles county (although I do live in San Diego, but that's a moot point).
They've called me several times, leaving this cryptic voice message. If it was actually legitimate, they'd probably at least address me by name.