Area Code 203 — Connecticut

Active General Purpose Code Overlay United States

Area code 203 is located in Connecticut and operates on Eastern Time . The largest city served is Bridgeport .

Coverage Area

Area code 203 — Connecticut

Area Code Details

Area Code: 203
State / Province: Connecticut (CT)
Country: United States
Time Zone: Eastern Time Eastern Time
Local Time Now: —
Status: Active
Code Type: General Purpose Code
In Service Since: January 1, 1947
Assigned: January 1, 1947
Population Served: ~932,923 est.
Overlay Complex: 203/475

Cities Served

Largest City Bridgeport

Bridgeport New Haven Stamford Waterbury Norwalk Danbury Meriden Fairfield Trumbull Naugatuck Darien New Canaan Greenwich Byram

History & Relationships

New codes split from 203

475 Connecticut 860 Connecticut

Overlay complex — shares geography with

475 Connecticut

Rate Centers & Exchanges

14 rate centers identified within area code 203

View exchanges →

Other Area Codes in Connecticut

Nearby Area Codes

Frequently Asked Questions About Area Code 203

What state is area code 203?

Area code 203 is located in Connecticut, United States.

Where is area code 203 from?

Area code 203 originates from Connecticut. It operates in the Eastern Time zone.

What time zone is area code 203?

Area code 203 falls within the Eastern Time zone (Eastern Time).

What cities are in area code 203?

Area code 203 serves cities including Bridgeport, New Haven, Stamford, Waterbury, Norwalk, Danbury, Meriden, Fairfield, and more.

Is a call from area code 203 a scam?

Area code 203 is a legitimate general purpose code area code serving Connecticut. Like any area code, individual numbers using 203 can be used for scam calls — always verify the specific number if you receive an unexpected or suspicious call.