On day we all received an unknown phone call and we wondered: whose number is this? I personally had that experience some time ago with someone that started calling me on weekends from 4am to 6am. I never kept the cell phone near me while I was sleeping so only in the morning I realized that someone had called me. At the time I had no idea that there was a service we could use to look up for the owner’s number so I just sent a text message to …