The 312 area code encompasses Chicago's central business district, which is a major economic hub and financial center. It is home to numerous corporate headquarters, financial institutions, and a thriving professional services sector. Tourism and hospitality are also significant industries in the downtown area.
Area code 312 serves the central business district of Chicago, Illinois, as well as parts of the Near North Side, Near South Side, West Loop, and Near West Side neighborhoods within the Chicago city limits. It borders area codes 773 (covering other parts of Chicago), 708 (suburban Cook County), and 630/331 (DuPage County, western suburbs).
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Area code 312 covers the central business district of Chicago, Illinois, as well as some surrounding neighborhoods within the city limits of Chicago. It encompasses downtown Chicago and portions of the Near North Side, Near South Side, West Loop, and Near West Side communities. Neighboring area codes include 773 (Chicago), 708 (suburban Cook County), and 630/331 (DuPage County).
The area covered by area code 312 is densely populated with a diverse mix of residents and workers. It includes a high concentration of young professionals, families, and a sizable business community. The population is culturally diverse, reflecting Chicago's status as a global city.
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