| 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 |
|---|---|---|---|
| 203-457 | Guilford | New Haven | Landline |
| 203-447 | Shelton | Fairfield | Landline |
| 203-669 | Darien | Fairfield | Landline |
| 203-216 | Westport | Fairfield | Wireless |
| 203-321 | Stamford | Fairfield | Landline |
| 203-695 | Waterbury | New Haven | Landline |
| 203-767 | Bridgeport | Fairfield | Wireless |
| 203-751 | Ansonia | New Haven | Landline |
| 203-295 | Stamford | Fairfield | Landline |
| 203-926 | Shelton | Fairfield | Landline |
| 203-215 | New Haven | New Haven | Wireless |
| 203-731 | Danbury | Fairfield | Landline |
| 203-649 | Cheshire | New Haven | Landline |
| 203-221 | Westport | Fairfield | Landline |
| 203-806 | Cheshire | New Haven | Landline |
| 203-397 | New Haven | New Haven | Landline |
| 203-853 | Norwalk | Fairfield | Landline |
| 203-666 | Bridgeport | Fairfield | Landline |
| 203-343 | Ansonia | New Haven | Wireless |
| 203-759 | Waterbury | New Haven | Landline |