Online Cell phone directory has become one of the most efficient usages in the world. Instead of scanning through telephone directory Internet will be better to serve more and better information about the numbers. There are specific websites for the purpose of cell phone number finder so that people can save the time and go on with their proper daily schedule. These websites give options such as the specified name with state and other details so that anyone can find the accurate number using the cell phone number finder. This kind of cell phone directory is obviously a useful source but sometimes it may give drastic defects such as threat, robbery, etc. This mostly occurs when a person have the details about the other concerned person like for example, state & name they can easily get in touch with people and get on to them personally. Some of the advanced search engines in the website such as cell phone number finder give the complete information about the specific person where it leads their life to danger. It also has negative factors like this. Some of the websites make use reverse cell phone lookup where they can get the detail information about a particular person they want to contact.