Geographic Regions and Area Codes

Area code 203 is located in southwestern Connecticut. It covers several major cities including Bridgeport, New Haven, Stamford, Waterbury, and Norwalk. The area code also extends to parts of Fairfield, New Haven, and Litchfield counties. In 2009, area code 475 was introduced as an overlay to 203, serving the same geographic region. This means that both area codes cover the same areas, providing additional numbering options for businesses and residents.

Key cities in the 203 area code include:

  • Bridgeport
  • New Haven
  • Stamford
  • Waterbury
  • Norwalk