If you actually call that same number back (805-897-1183), an answering machine picks up and says a bunch of stuff, but they say at the end that if you no longer want them calling you to just leave your phone number as the message. I haven't gotten any more calls since I did that. Hope that helps!
this number is calling at least twice a day & hangs up after my answering message finishes. the party leaves no message, just hangs up. i 'googled' the # to see who it is & i got this site.