I got a call from this number, too! And I'm not even from San Francisco. Did anyone ever find out who it is? I figure I'll call it later on today. I'll post if I find out anything.
It's a "rejection hotline" number for the San Francisco area! I dont' know why someone from that number would be calling me, unless they have it set up as a return number on their phone or something. Mystery solved. Give it a call and have a laugh.