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# California Area Code 626
The 626 area code serves the San Gabriel Valley region of Los Angeles County in Southern California, covering communities including Pasadena, Arcadia, Glendale, and Alhambra. Established in 1997 as an overlay to the original 818 area code, the 626 area code was created to accommodate the rapid population growth and increased demand for telephone numbers in the region. Today, it is one of California's most populated area codes, serving millions of residents and businesses in this economically diverse and culturally vibrant part of the greater Los Angeles metropolitan area.
The 626 area code is part of the North American Numbering Plan (NANP), a coordinated telephone numbering system used across North America, including the United States, Canada, and several Caribbean nations. The NANP organizes phone numbers into a standardized format of three-digit area codes followed by seven-digit local numbers. Area codes are assigned by the North American Numbering Plan Administration (NANPA) and are managed by individual countries and regulatory bodies like the Federal Communications Commission (FCC) in the United States. When existing area codes become exhausted due to population growth or increased telecommunications needs, new codes like 626 are created as overlays or replacements to ensure adequate numbering resources for the region.