A cell phone directory management system includes at least one name and associated telephone number stored in an on-board electronic memory, a timing chip for keeping track of current date and time and a means for date and time stamping the name during a call event (a call event occurs when either the cell phone holder places a call to the named person or when that named person calls the cell phone holder). When a future call event occurs, the present management system indicates or otherwise conveys to the cell phone holder the amount of time that has elapsed between events for that particular named listing in the directory. The means for conveying the time between call events for any particular person listed in the directory can be numerically displayed, audibly conveyed, or graphically displayed. If the time period between call events is longer than a prescribed value, the name in the directory will be either marked to indicate so and/or the cell phone holder can be so notified (such as with a beep and displaying the name), or the name and associated information can be electronically removed from the main directory list in the cell phone and either erased entirely, or simply moved to a different directory so that only the most popular telephone numbers are maintained in the main directory.