Find any 928- phone number in Arizona
The 928 area code is a telephone area code in the North American Numbering Plan (NANP). It serves the northern and eastern parts of Arizona, covering the entire state excluding the Phoenix Metropolitan Area.The 928 area code has been in service since 1995, when it split from the 602 area code in an effort to meet the increasing demand for telephone services. The North American Numbering Plan (NANP) is the system that organizes telephone numbers within geographic areas in the United States and its territories. These regions are known as Numbering Plan Areas (NPA's). Every NPA area code defines a geographic region of overlapping geographic area codes that are assigned within that area. The 928 area code is one of these 79 NPA's currently used in the United States.
Within the 928 area code, numbering patterns are broken into subdivisions known as NXX codes. The NXX code is the first three digits within the area code and stands for the central office switch or whatever else the code is assigned to. The NXX code is critical in the way the North American Numbering Plan (NANP) divides large geographic regions into smaller, more manageable areas by providing phone numbers with a distinct beginning and end. This helps to alleviate confusion and streamline communications in the 928 area code.