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# Louisiana Area Code 225
The 225 area code serves the capital region of Louisiana, primarily covering Baton Rouge and surrounding communities in East Baton Rouge Parish and adjacent areas. Established in 1998 as an overlay to the original 504 area code, the 225 area code was created to accommodate the growing telecommunications demand in the region as the Baton Rouge metropolitan area expanded. Today, the 225 area code is one of Louisiana's most recognizable dialing codes and serves millions of residents, businesses, and institutions in the state capital, including Louisiana State University and numerous government offices that operate from the city.
The 225 area code is part of the North American Numbering Plan (NANP), a standardized system that organizes telephone numbers across the United States, Canada, and several Caribbean nations. The NANP assigns three-digit area codes to geographic regions, with each area code capable of supporting millions of individual phone numbers through the seven-digit local exchange system. When the 225 area code was introduced as an overlay, both it and the original 504 code remained active in the same geographic region, requiring callers to dial the area code for all calls, whether local or long-distance. This system ensures efficient use of the limited telephone number resources while allowing regions to grow without exhausting their available numbers.