You can lookup cell phone number using the cell phone directory assistance. You can also track the call easily and arrest the nuisance caller of required. You can get untold peace with the use of a free cell phone directory. You can also help other people to stop getting calls from prank callers and not be victimized. In searching for these persons, you must make sure that you make use of reliable cell phone directory assistance. There are numerous directory assistances online and you must choose one that is safe enough and well known. By taking up adequate research you can find out the best cellular phone directory that is free also. Reliable information can be had from trusted sites only and you must be patient for gathering adequate details. Both free and paid services are available online and you can choose one based on your requirement. Finding numbers of friends and relatives becomes easy with the use of cell phone directory assistance.