Being able to trace cell phones is becoming easier and easier today, you just need to know where to look and what to look for. Below are three quick tips for good look ups. First, the best place to look for a reverse cell phone directory is online. It is simple and efficient. All you need to do is have access to the internet, and you are already on your way to tracing that number. Just simply open up any search engine and type in reverse cell phone directories. You will then get a bunch of results that offer these services.