This is an odd one, I would assume that most people do not even know that this number has called their home. It has been calling my home for weeks on end, usually at 30 minutes past an hour. Night and day.  On landline, all it shows is incoming call and nothing else. I have an enhanced phone system that also displays the call information on the television screen . On the television screen, this number appears for about one and a half seconds and disappears. It does not show up in the call logs as a missed call or an answered call or any kind of call. If I were not home, I would have no idea  that they called. This is scary. I hope someone else caught it too.