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USA Cities & Listing Area Codes

Welcome to our directory of area codes by city across the United States. This page allows you to quickly locate the area code for any U.S. city, providing an easy reference for those looking to identify or verify phone codes. Browse through the cities listed below to find detailed area code information tailored to each location.

USA Cities & Area Codes

San Clemente (CA)
San Clemente, located in southern California, is a coastal city within Orange County, known for its …
San Diego (CA)
San Diego, located in Southern California, is the second-largest city in the state and the eighth-la…
San Dimas (CA)
San Dimas, located in Los Angeles County, California, is a city known for its blend of suburban char…
San Fernando (CA)
San Fernando, California, is a city located in the San Fernando Valley region of Los Angeles County.…
San Jose (CA)
San Jose, located in the heart of Silicon Valley, is the largest city in Northern California and the…
San Juan (TX)
San Juan, Texas, located in Hidalgo County, is a city with a rich historical background and diverse …
San Juan Capistrano (CA)
San Juan Capistrano, located in Orange County, California, is known for its rich history and cultura…
San Leandro (CA)
San Leandro, located in Alameda County, California, is a city with a rich history and strategic posi…
San Lorenzo (CA)
San Lorenzo, California, located in Alameda County, is an unincorporated community with a rich histo…
San Luis Obispo (CA)
San Luis Obispo, located on California's Central Coast, serves as the county seat of San Luis Obispo…
San Marcos (CA)
San Marcos, California, located in San Diego County, is known for its unique blend of suburban livin…
San Marcos (TX)
San Marcos, Texas, located in Hays County, serves as a notable city within the Greater San Antonio m…
  • How do I find the area code for a specific U.S. city?

    Simply scroll through our city listings or use the search feature to find the city you’re looking for. Each city entry includes the area code(s) that correspond to that location.

  • Do some cities have multiple area codes?

    Yes, larger cities or those in regions with high demand often have multiple area codes. This allows for a greater number of phone numbers within the same geographic area and helps accommodate growth in highly populated locations.

  • Why might a city’s area code change or gain additional codes?

    Area codes are added or changed as cities grow and require more phone numbers. This often results in overlay codes or splits, where new area codes are introduced alongside existing ones to ensure adequate numbering for all residents and businesses.