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# The 256 Area Code and North American Numbering Plan

The 256 area code serves northern Alabama, covering major cities including Huntsville, Decatur, and Gadsden. Established in 1995 as a split from the original 205 area code, the 256 designation was assigned to accommodate the growing telecommunications demands of the region's expanding population and increasing business activity. This area code encompasses approximately 18 counties in northern Alabama and represents one of the state's most economically significant regions, home to major employers like NASA's Marshall Space Flight Center and various technology and manufacturing industries.

The 256 area code is part of the North American Numbering Plan (NANP), a standardized system that organizes telephone numbering across North America, including the United States, Canada, and several Caribbean nations. The NANP assigns three-digit area codes to geographic regions, with each area code paired to a specific territory to ensure efficient call routing and telecommunications management. The system is administered by the North American Numbering Plan Administration (NANPA) and operates under the oversight of the International Telecommunication Union. When the 256 area code was created, it followed the NANP's established protocols for area code splits, ensuring that existing customers could retain their numbers while new telephone numbers could be issued to support regional growth and development.