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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

Norwich (CT)

Norwich (CT)

Norwich, Connecticut, established in 1659, is a city rich in history and diverse cultural heritage. …

Norwood (MA)

Norwood (MA)

Norwood, Massachusetts, located approximately 17 miles southwest of downtown Boston, is a town steep…

Norwood (OH)

Norwood (OH)

Norwood, Ohio, is an independent city located just north of Cincinnati, established in 1888. The cit…

Novato (CA)

Novato (CA)

Novato, located in Marin County, California, is a city known for its scenic landscapes and rich hist…

Novi (MI)

Novi (MI)

Novi, Michigan, incorporated as a city in 1969, is located in Oakland County, approximately 30 miles…

Nutley (NJ)

Nutley (NJ)

Nutley, New Jersey, located in Essex County, is a township with a rich historical background and a p…

O’Fallon (IL)

O’Fallon (IL)

O’Fallon, Illinois, located in St. Clair County, is a rapidly growing city in the Metropolitan St. L…

O’Fallon (MO)

O’Fallon (MO)

O'Fallon, Missouri, located in St. Charles County, is a city renowned for its rapid growth and commu…

Oak Creek (WI)

Oak Creek (WI)

Oak Creek, Wisconsin, is a city located in Milwaukee County, south of the city of Milwaukee. Establi…

Oak Forest (IL)

Oak Forest (IL)

Oak Forest, located in Cook County, Illinois, is a city with a rich history and a unique blend of su…

Oak Lawn (IL)

Oak Lawn (IL)

Oak Lawn, located in Cook County, Illinois, is a suburban village situated approximately 20 miles so…

Oak Park (IL)

Oak Park (IL)

Oak Park, located in Cook County, Illinois, is a suburban village adjacent to Chicago, known for its…

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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.