Tired of flipping through the pages of bulky telephone books but finding it hard to locate the number of the company or person you want to call for? Visit the National Phone Book . It is online directory for reverse phone look up for local and state phone book directory information. It likeiwse saves you time and energy to find the owner of a cellphone, to trace the person who is calling you from an unpublished number including the caller's identity and address. Click at www.nationalphonebook.org.