Connecticut Area Code

Connecticut area code refers to the numerical code assigned to specific geographic regions within the state of Connecticut for telephone numbering purposes. Connecticut currently has two area codes, which are 203 and 475.

State Connecticut
State Abbreviation: CT
State Nickname: Constitution State Equality State
Capital City Hartford
Area Codes 203, 475, 860
Timezone Eastern Time Zone (ET)
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What time zone is Connecticut?

Connecticut is primarily in the Eastern Time Zone (ET). The area code for Connecticut, including cities like Hartford, New Haven, and Bridgeport, follows this time zone. Eastern Time is typically UTC-5 during Standard Time and UTC-4 during Daylight Saving Time (DST), which is usually observed from the second Sunday in March to the first Sunday in November. Please note that the start and end dates of Daylight Saving Time can vary, so it's a good idea to check the current time zone rules if you need precise timing information.

Note that the start and end dates of daylight saving time can change


The 203 area code in Connecticut, established in 1947, has been supplemented by overlays to meet increased demand. In 1995, the 860 area code was added, followed by the 475 area code in 2009. These overlays expanded available phone numbers while retaining the original 203 area code, ensuring ample resources for telecommunications in the state.

All Area Codes in Connecticut

This table provides a quick overview of all area codes, their locations, and some historical context for each.

Area Code Location History and Details
203 Southwestern Connecticut Covers cities like Bridgeport, Stamford, Norwalk, and Danbury.
475 Overlay for 203 An overlay code allowing additional phone number assignments in the same region.

Largest Cities in Connecticut with area codes

Quick overview of large cities, their area codes, and some historical context for each in connecticut.

Name Area Code History and Details
Bridgeport 203, 475 Connecticut's largest city, known for its historic seaport and cultural attractions.
New Haven 203, 475 Home to Yale University, New Haven is a vibrant city with a rich academic and cultural scene.
Hartford 860, 959 The capital of Connecticut, Hartford is a hub for government, finance, and insurance industries.
Stamford 203, 475 A coastal city known for its corporate headquarters and proximity to New York City.
Waterbury 203, 475 Located in the Naugatuck Valley, Waterbury has a strong industrial history.
Norwalk 203, 475 A coastal city with a thriving arts and cultural community.
Danbury 203, 475 Known for its diverse population and strong sense of community.
New Britain 860, 959 Home to Central Connecticut State University and renowned museums.
West Hartford 860, 959 A suburban town with a charming downtown area and excellent schools.
Greenwich 203, 475 Known for its affluence and beautiful waterfront properties.