| 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 |
|---|---|---|---|
| 203-265 | Wallingford | New Haven | Landline |
| 203-685 | Bridgeport | Fairfield | Wireless |
| 203-747 | New Haven | New Haven | Landline |
| 203-643 | Branford | New Haven | Landline |
| 203-239 | Hamden | New Haven | Landline |
| 203-293 | Stamford | Fairfield | Landline |
| 203-816 | Trumbull | Fairfield | Landline |
| 203-320 | Darien | Fairfield | Landline |
| 203-719 | Stamford | Fairfield | Landline |
| 203-379 | Meriden | New Haven | Landline |
| 203-875 | Darien | Fairfield | Landline |
| 203-392 | New Haven | New Haven | Landline |
| 203-358 | Stamford | Fairfield | Landline |
| 203-331 | Bridgeport | Fairfield | Landline |
| 203-712 | Shelton | Fairfield | Landline |
| 203-798 | Danbury | Fairfield | Landline |
| 203-482 | Danbury | Fairfield | Wireless |
| 203-982 | Waterbury | New Haven | Wireless |
| 203-595 | Stamford | Fairfield | Landline |
| 203-641 | New Haven | New Haven | Wireless |