I just got the same call from "carpet care" 310-487-598.  I said I would like to schedule an appointment and the girl hung up.

I got a call from that same number just now with the last digit missing.

If the last digit was missing then how do you know
this is the right number?

Same number didn't say anything.

This number showed up on my caller ID as 310-487-598 (with a digit missing).  It was a pre-recorded message for a carpet cleaning company -- I decided to press #1 to make an appointment to try and get a "real" call back number.  Told the man who answered that I was in traffic and asked for a number to call him back at, he said he could call me back later.  I said no, please just give me a number to reach you at and he hung up on me.  Infuriating.