The plan to implement or have a U.S. Free Cell Phone Directory is a controversial topic. While there are some supporters for the same there are many who are against a free cell phone directory. You can lookup cell phone number using such a directory. As there is a growing rate of cell phone users it may become very difficult to keep track of cell phone numbers of family and friends. To an extent this problem can be solved using the built in phone book that stores personal cell numbers. However a handy thing would be the free cell phone directory would come in handy. At times when you need to contact your child’s friend, a co-worker or a neighbor a free cell phone directory would be very useful. A free reverse call directory would also help you know whom the call is from in case you do not know the number.