I've received 7 calls in 3 days from this number.  I called the # back once, because it is my area code and this is my work phone so I thought it was a legitimate call.  I got a recording saying "operators will be with you shortly" so I immediately hung up.  But that is probably the reason they kept calling because then they knew it was a good #.  I haven't received any calls from this # since November 3rd, but keep getting calls from other #s including another 323 # (323.284.2728) which I've also logged.

My phone is now on vibrate and if it isn't a legitimate work call (their name will come up), I don't answer.  

It's annoying, but at least it's not my personal cell #!