This jerk keeps calling my main house number at least a few times a day.  I don't know if it's a telemarketer or not since they don't leave a message, but one time I picked up without saying anything and I heard a man say, "WTF, hello?", then he hung up.

I don't know what their deal is, but if it's a mortgage company like the previous comments have stated, then they're wasting their time.  I don't own a home, I rent.