Who called from 3104239500

typing on keyboard and music in background

didn't recognize the number so i didn't answer

I have received four calls from this number. When I picked up the first time, I heard a few beeps in a row. I didn't pick up the 2nd, 3rd, or 4th times, and each time the caller left a message with either 4-5 beeps. Weird.

This number is the billing office for Cedar Sinai...