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# California Area Code 310
The 310 area code serves the Los Angeles area, specifically covering much of the western and southwestern portions of Los Angeles County, including communities such as Santa Monica, Manhattan Beach, Torrance, and Long Beach. Established in 1992 through a split of the original 213 area code, the 310 area code has become one of California's most recognizable telephone designations. This region encompasses both coastal communities and inland areas, serving millions of residents and businesses in one of the most economically significant parts of the United States. The area code is particularly notable for its association with entertainment industry professionals, celebrities, and major corporate headquarters located throughout the Los Angeles metropolitan area.
The North American Numbering Plan (NANP) is the standardized system that designates area codes like 310 throughout the United States, Canada, and other North American territories. Under this system, telephone numbers are organized into a hierarchical structure consisting of three-digit area codes followed by seven-digit local numbers. Area codes are assigned by the North American Numbering Plan Administrator (NANPA) based on geographic regions and population density, ensuring efficient call routing and management of telephone resources. When area codes become saturated due to population growth or increased demand for phone numbers, new codes are created through splits or overlays, as occurred with 310 when it was separated from 213 to accommodate the growing telecommunications needs of the Los Angeles region.