DETAILED LOOKUP FOR 203, 860, 475, 959

Connecticut Area Codes: What You Need to Know About 203, 860, 475, and 959 If you're trying to figure out area codes in Connecticut, you're not alone. Map of Connecticut Area Codes What Are the Area Codes in Connecticut? Here’s a detailed look at the list of Connecticut area codes: 203: Established in 1947, covering Southwestern Connect