Caller ID showed 323-485-9933. They call every few days, never leave a message on the machine, and both times I answered, pleasantly, with the intention of finding out who it was (and eventually asking them to take us off their list), they just hung up without engaging in conversation. Second time was a slick-sounding young woman, who also hung up after she said "hello hello."
If they don't want to talk--WHY DO THEY KEEP CALLING? (We pay for an unlisted number--AND are on the "Do Not call" registry...)
Yelling at these scumbags will not make them stop. Might I suggest speaking VERY softly. If you have to, act like you have a medical problem so they have to turn up the volume on their end. Once you are sure they have done this and have the phone tight to their ear, blow a police whistle into your mouthpiece, or a canned air horn. Just think of the look on the lawbreaker's face!
Called 8/20/15 at 9:36 am. Caller ID showed "Los Angeles CA". My phone answered by Sentry robo call blocker, so they didn't get through. With that kind of ID you know it is not legit.