| General Information about Area Code 203 | |
|---|---|
| Country | United States |
| State / Province / Territory | Connecticut |
| Major City | New Haven |
| Time Zone | Eastern (UTC-05:00) |
| Prefix | Primary City | County | Phone Type |
|---|---|---|---|
| 203-616 | Danbury | Fairfield | Landline |
| 203-709 | Waterbury | New Haven | Landline |
| 203-517 | Stamford | Fairfield | Landline |
| 203-307 | Fairfield | Fairfield | Landline |
| 203-862 | Greenwich | Fairfield | Landline |
| 203-497 | New Haven | New Haven | Landline |
| 203-750 | Norwalk | Fairfield | Landline |
| 203-849 | Norwalk | Fairfield | Landline |
| 203-787 | New Haven | New Haven | Landline |
| 203-718 | Cheshire | New Haven | Landline |
| 203-365 | Bridgeport | Fairfield | Landline |
| 203-483 | Branford | New Haven | Landline |
| 203-234 | Hamden | New Haven | Landline |
| 203-405 | Woodbury | Litchfield | Landline |
| 203-507 | New Haven | New Haven | Wireless |
| 203-453 | Guilford | New Haven | Landline |
| 203-485 | Greenwich | Fairfield | Landline |
| 203-908 | Bridgeport | Fairfield | Wireless |
| 203-523 | Norwalk | Fairfield | Landline |
| 203-241 | Danbury | Fairfield | Wireless |