The most populous cities in area code 510 are: Oakland, Fremont, Hayward, San Francisco, and Berkeley.
Other cities in the 510 area code include: Richmond, Union City, El Sobrante, San Leandro, Hercules, Alameda, Albany, Castro Valley, Crockett, San Jose, Walnut Creek, and Sunnyvale.
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Oakland / ˈ oʊ k l ə n d / is the largest city and the county seat of Alameda County, California, United States. A major West Coast port city, Oakland is the largest city in the East Bay region of the San Francisco Bay Area, the third largest city overall in the San Francisco Bay Area, the eighth largest city in California, and the 45th largest city in the United States, with a population of 419,267 as of 2015 . It serves as a trade center for the San Francisco Bay Area ; its Port of Oakland is the busiest port in the San Francisco Bay, the entirety of Northern California, and the fifth busiest in the United States. The city was incorporated in 1852.Oakland's territory covers what was once a mosaic of California coastal terrace prairie, oak woodland, and north coastal scrub. Its land served as a rich resource when its hillside oak and redwood timber were logged to build San Francisco, and Oakland's fertile flatland soils helped it become a prolific agricultural region. In the late 1860s, Oakland was selected as the western terminal of the Transcontinental Railroad. Following the 1906 San Francisco earthquake, many San Francisco citizens moved to Oakland, enlarging the city's population, increasing its housing stock and improving its infrastructure. It continued to grow in the 20th century with its busy port, shipyards, and a thriving automobile manufacturing industry.Oakland is known for its sustainability practices, including a top-ranking for usage of electricity from renewable resources. Oakland is also known for its history of political activism, as well as its professional sports franchises (such as the Oakland Raiders, Oakland Athletics and the Golden State Warriors) and major corporations, which include health care, dot-com companies, and manufacturers of household products. In addition, due to a steady influx of immigrants during the 20th century, along with thousands of African-American war-industry workers who relocated from the Deep South during the 1940s. Oakland is the most ethnically diverse major city in the country.
Fremont is a city in Alameda County, California, United States. It was incorporated on January 23, 1956, from the merger of five smaller communities: Centerville, Niles, Irvington, Mission San Jose, and Warm Springs. The city is named after American explorer John Charles Frémont.Located in the southeast section of the San Francisco Bay Area in the East Bay region primarily, Fremont has a population of around 230,000. It is the fourth most populous city in the San Francisco Bay Area, and the largest suburb in the metropolis. It is the closest East Bay city to Silicon Valley, and is thus sometimes associated with it.The area consisting of Fremont, Newark (an enclave of Fremont), and Union City (formed from the communities of Alvarado and Decoto), is now known as the Tri-City Area.Fremont is home to the largest population of Afghan Americans in the United States.
Hayward is a city located in Alameda County, California in the East Bay subregion of the San Francisco Bay Area. With a 2014 population of 149,392, Hayward is the sixth largest city in the Bay Area and the third largest in Alameda County. Hayward was ranked as the 37th most populous municipality in California. It is included in the San Francisco-Oakland-Fremont Metropolitan Statistical Area by the US Census. It is located primarily between Castro Valley and Union City, and lies at the eastern terminus of the San Mateo-Hayward Bridge. The city was devastated early in its history by the 1868 Hayward earthquake. From the early 20th century until the beginning of the 1980s, Hayward's economy was dominated by its now defunct food canning and salt production industries.
The 510 area code lies within the Pacific Daylight Time Zone (or PDT). The current time in Pacific Daylight Time is 11:03 AM on Jun 03, 2023.