| 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 |
|---|---|---|---|
| 203-285 | New Haven | New Haven | Landline |
| 203-667 | Stamford | Fairfield | Wireless |
| 203-688 | New Haven | New Haven | Landline |
| 203-845 | Norwalk | Fairfield | Landline |
| 203-599 | Meriden | New Haven | Landline |
| 203-953 | Bridgeport | Fairfield | Wireless |
| 203-979 | Stamford | Fairfield | Wireless |
| 203-455 | Bridgeport | Fairfield | Landline |
| 203-271 | Cheshire | New Haven | Landline |
| 203-269 | Wallingford | New Haven | Landline |
| 203-333 | Bridgeport | Fairfield | Landline |
| 203-792 | Danbury | Fairfield | Landline |
| 203-312 | Danbury | Fairfield | Landline |
| 203-842 | Stamford | Fairfield | Landline |
| 203-907 | New Haven | New Haven | Landline |
| 203-495 | New Haven | New Haven | Landline |
| 203-232 | Waterbury | New Haven | Wireless |
| 203-413 | Greenwich | Fairfield | Landline |
| 203-240 | Danbury | Fairfield | Wireless |
| 203-591 | Waterbury | New Haven | Landline |