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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

Marion (OH)
Marion, Ohio, located in the central part of the state, serves as the county seat of Marion County. …
Marlborough (MA)
Marlborough, Massachusetts, located in Middlesex County, is a city recognized for its rich history a…
Marrero (LA)
Marrero, Louisiana, is a census-designated place situated in Jefferson Parish, located just southwes…
Marshall (TX)
Marshall, Texas, located in the northeastern part of the state, serves as the seat of Harrison Count…
Marshalltown (IA)
Marshalltown, located in central Iowa, serves as the county seat of Marshall County. Founded in 1851…
Martinez (CA)
Martinez, California, located in Contra Costa County, is distinguished by its rich history and strat…
Martinez (GA)
Martinez, Georgia, located in Columbia County, is an unincorporated community situated just northwes…
Maryland Heights (MO)
Maryland Heights is a city located in St. Louis County, Missouri, with a population of approximately…
Marysville (WA)
Marysville, Washington, is a city located in Snohomish County, approximately 35 miles north of Seatt…
Maryville (TN)
Maryville, located in Blount County, Tennessee, serves as a significant city in the foothills of the…
Mason (OH)
Mason, Ohio, located in southwestern Warren County, is known for its vibrant community and strategic…
Mason City (IA)
Mason City, located in north-central Iowa, serves as the county seat of Cerro Gordo County. Founded …
  • 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.