I've been getting hang up calls from multiple numbers starting with 415-793.  This rash of calls makes me think that this may be come company robo calling and spoofing numbers.  They never leave a message and call almost every day.  I've tried to return calls but when i do manage to get someone the voice mail is just a first name or the caller says they haven't called me.  Below the result of calling back the last 4 times this happened.
The numbers that have called me are
415-793-1907 i didn't call you
415-793-2888  amy
415-793-1962 Trisha with comcast spotlight
415-793-3567 I didn't call you
415-793-8207
415-793-4010
415-793-1248

Called again today from 415 793 2238.  No one on the line when I answered.

This is the newest scam around.  They use the first digits of your number so that you might think you are getting a call from "a neighbor"  Since they are calling my cell that doesn't really work that well.