Finding Mr. Anonymous

I was tired of all those annoying anonymous callers who loved to pick up on me when I was doing something real important, irritate me for a good few minutes, act totally funny and then cut the call without a word as to who they are. And of course, these calls will occur again. Don't these people ever get tired? And I leave all my official work to wonder, "Who Just Called Me?" It was more than irritation that I felt. I needed to know who these pranksters were and put them in place. And that's how I landed up in this phone lookup service which guaranteed to find me who my Mr. Anon was. They got me not only the person's name, but a few other details too which helped me trace him out quicker than he could say "Hello" and gave him a piece of my mind. Maybe I was real good, because I haven't had any unwanted calls after that.