I am sick and tired of this number calling me! it calls at least 2 to 4 times a day...when i call back it just keeps ringing..

I too get several calls a day from this number and caller ID at all times during the day, latest one was 6 am. Very annoying, and all you hear is a "Beep" when you answer it. I also receive calls from same Caller ID but uses different number, (403) 243-3641, (403) 243-1526 and (403) 230-5687, same as above just a beep on other end of phone. I was told by friend it's a robo-dialer. Can't these calls or people be stopped???