Area Code 203 at a Glance
| Area code | 203 |
| Region | New Haven, CT |
| Country | United States |
| Primary timezone | America/New_York |
| Dialing format | +1 (203) NXX-XXXX |
Cities and Places Using Area Code 203
Based on prefix-level carrier data, area code 203 covers places including:
- Connecticut
- New Haven, CT
- Stamford, CT
- Norwalk, CT
- Bridgeport, CT
- Greenwich, CT
- Waterbury, CT
- Milford, CT
- Shelton, CT
- Meriden, CT
- Danbury, CT
- Westport, CT
Frequently Asked Questions
Where is area code 203?
Area code 203 serves New Haven, CT, United States.
Who is calling me from area code 203?
A call from area code 203 most likely originates from New Haven, CT, but caller ID can be spoofed. If an unknown caller asks for personal or payment information, hang up and call the organization back on its official number.
How do I dial a 203 number?
Within North America: dial 1-203 followed by the 7-digit number. From abroad: your international prefix (like 00 or +), then 1 203 and the number.