Area code 203 serves southwestern Connecticut, including major cities like Stamford, New Haven, Bridgeport, and Norwalk. Known for its close ties to New York City and its blend of affluent suburbs and historic urban centers, the 203 area code reflects Connecticut’s role as both a financial corridor and a cultural hub. It was one of the original area codes introduced in 1947 and today shares coverage with overlay 475. Stamford and Norwalk are business powerhouses with numerous corporate headquarters, including Charter Communications, Synchrony Financial, and multiple hedge funds. These cities attract commuters, remote workers, and executives due to their upscale neighborhoods and proximity to Manhattan. New Haven, home to Yale University, contributes academic prestige, biomedical research, and a thriving arts scene. Bridgeport, Connecticut’s most populous city, is revitalizing through investment in transportation, education, and tech. The region offers a high quality of life, top-rated schools, and scenic Long Island Sound coastline. From beach communities to bustling downtowns, 203 covers a broad and desirable part of Connecticut. Whether you’re launching a startup, managing a law firm, or setting up a local service business, a 203 number provides a professional foothold in one of New England’s most influential zones.