619 Area Code 🌍☎️

San Diego is a major city in California, United States. It is in San Diego County, on the coast of the Pacific Ocean in Southern California, approximately 120 miles (190 km) south of Los Angeles and immediately adjacent to the border with Mexico.With an estimated population of 1,394,928 as of July 1, 2015, San Diego is the eighth-largest city in the United States and second-largest in California. It is part of the San Diego–Tijuana conurbation, the second-largest transborder agglomeration between the US and a bordering country after Detroit–Windsor, with a population of 4,922,723 people. San Diego has been called "the birthplace of California". It is known for its mild year-round climate, natural deep-water harbor, extensive beaches, long association with the United States Navy, and recent emergence as a healthcare and biotechnology development center.Historically home to the Kumeyaay people, San Diego was the first site visited by Europeans on what is now the West Coast of the United States. Upon landing in San Diego Bay in 1542, Juan Rodríguez Cabrillo claimed the area for Spain, forming the basis for the settlement of Alta California 200 years later. The Presidio and Mission San Diego de Alcalá, founded in 1769, formed the first European settlement in what is now California. In 1821, San Diego became part of the newly independent Mexico, which reformed as the First Mexican Republic two years later. In 1850, California became part of the United States following the Mexican–American War and the admission of California to the union.The city is the seat of San Diego County and is the economic center of the region as well as the San Diego–Tijuana metropolitan area. San Diego's main economic engines are military and defense-related activities, tourism, international trade, and manufacturing. The presence of the University of California, San Diego (UCSD), with the affiliated UCSD Medical Center, has helped make the area a center of research in biotechnology.

Chula Vista is the second largest city in the San Diego metropolitan area, the seventh largest city in Southern California, the fourteenth largest city in the state of California, and the 76th-largest city in the United States. The population was 243,916 as of the 2010 census. Located just 7.5 miles (12.1 km) from downtown San Diego and 7.5 miles (12.1 km) from the Mexican border in the South Bay region of the metropolitan area, the city is at the center of one of the richest economic and culturally diverse zones in the United States. Chula Vista is so named because of its scenic location between the San Diego Bay and coastal mountain foothills.Founded in the early 19th century, fast population growth has recently been observed in the city. Located in the city is one of America's few year-round United States Olympic Training centers and popular tourist destinations include Mattress Firm Amphitheatre, the Chula Vista marina, and the Living Coast Discovery Center.

El Cajon is a city in San Diego County, California, United States. In a valley surrounded by mountains, the city has acquired the nickname of "The Big Box." Its name originated similarly, from the Spanish phrase "el cajón," which means "the box" or "the drawer."