| 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 |
|---|---|---|---|
| 203-864 | Bridgeport | Fairfield | Wireless |
| 203-981 | Norwalk | Fairfield | Wireless |
| 203-957 | Norwalk | Fairfield | Landline |
| 203-629 | Greenwich | Fairfield | Landline |
| 203-733 | Danbury | Fairfield | Wireless |
| 203-338 | Bridgeport | Fairfield | Landline |
| 203-598 | Waterbury | New Haven | Landline |
| 203-376 | New Haven | New Haven | Wireless |
| 203-633 | Wolcott | New Haven | Landline |
| 203-563 | Wilton | Fairfield | Landline |
| 203-207 | Danbury | Fairfield | Landline |
| 203-309 | New Haven | New Haven | Wireless |
| 203-538 | Shelton | Fairfield | Landline |
| 203-213 | Meriden | New Haven | Wireless |
| 203-691 | New Haven | New Haven | Landline |
| 203-909 | New Haven | New Haven | Wireless |
| 203-947 | Danbury | Fairfield | Wireless |
| 203-714 | Naugatuck | New Haven | Landline |
| 203-702 | Danbury | Fairfield | Landline |
| 203-335 | Bridgeport | Fairfield | Landline |