San Mateo, located in San Mateo County, California, sits along the San Francisco Peninsula. The city…
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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.
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.
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.
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.
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